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A constructed language (shortened to conlang) is a
language Language is a structured system of communication that consists of grammar and vocabulary. It is the primary means by which humans convey meaning, both in spoken and signed language, signed forms, and may also be conveyed through writing syste ...
whose
phonology Phonology (formerly also phonemics or phonematics: "phonemics ''n.'' 'obsolescent''1. Any procedure for identifying the phonemes of a language from a corpus of data. 2. (formerly also phonematics) A former synonym for phonology, often pre ...
,
grammar In linguistics, grammar is the set of rules for how a natural language is structured, as demonstrated by its speakers or writers. Grammar rules may concern the use of clauses, phrases, and words. The term may also refer to the study of such rul ...
,
orthography An orthography is a set of convention (norm), conventions for writing a language, including norms of spelling, punctuation, Word#Word boundaries, word boundaries, capitalization, hyphenation, and Emphasis (typography), emphasis. Most national ...
, and
vocabulary A vocabulary (also known as a lexicon) is a set of words, typically the set in a language or the set known to an individual. The word ''vocabulary'' originated from the Latin , meaning "a word, name". It forms an essential component of languag ...
, instead of having developed naturally, are consciously devised for some purpose, which may include being devised for a work of fiction. A constructed language may also be referred to as an artificial, planned or invented language, or (in some cases) a fictional language. ''Planned languages'' (or engineered languages / engelangs) are languages that have been purposefully designed; they are the result of deliberate, controlling intervention and are thus of a form of ''
language planning In sociolinguistics, language planning (also known as language engineering) is a deliberate effort to influence the function, structure or acquisition of languages or language varieties within a speech community.Kaplan B., Robert, and Rich ...
''. There are many possible reasons to create a constructed language, such as to ease human
communication Communication is commonly defined as the transmission of information. Its precise definition is disputed and there are disagreements about whether Intention, unintentional or failed transmissions are included and whether communication not onl ...
(see
international auxiliary language An international auxiliary language (sometimes acronymized as IAL or contracted as auxlang) is a language meant for communication between people from different nations, who do not share a common first language. An auxiliary language is primarily a ...
and
code In communications and information processing, code is a system of rules to convert information—such as a letter, word, sound, image, or gesture—into another form, sometimes shortened or secret, for communication through a communicati ...
); to give
fiction Fiction is any creative work, chiefly any narrative work, portraying character (arts), individuals, events, or setting (narrative), places that are imagination, imaginary or in ways that are imaginary. Fictional portrayals are thus inconsistent ...
or an associated constructed setting an added layer of realism; for experimentation in the fields of
linguistics Linguistics is the scientific study of language. The areas of linguistic analysis are syntax (rules governing the structure of sentences), semantics (meaning), Morphology (linguistics), morphology (structure of words), phonetics (speech sounds ...
,
cognitive science Cognitive science is the interdisciplinary, scientific study of the mind and its processes. It examines the nature, the tasks, and the functions of cognition (in a broad sense). Mental faculties of concern to cognitive scientists include percep ...
, and
machine learning Machine learning (ML) is a field of study in artificial intelligence concerned with the development and study of Computational statistics, statistical algorithms that can learn from data and generalise to unseen data, and thus perform Task ( ...
; for artistic creation; for fantasy
role-playing game A role-playing game (sometimes spelled roleplaying game, or abbreviated as RPG) is a game in which players assume the roles of player character, characters in a fictional Setting (narrative), setting. Players take responsibility for acting out ...
s; and for
language game A language game (also called a cant, secret language, ludling, or argot) is a system of manipulating spoken words to render them incomprehensible to an untrained listener. Language games are used primarily by groups attempting to conceal their ...
s. Some people may also make constructed languages as a
hobby A hobby is considered to be a regular activity that is done for enjoyment, typically during one's leisure time. Hobbies include collecting themed items and objects, engaging in creative and artistic pursuits, playing sports, or pursuing other ...
, or in connection to
worldbuilding Worldbuilding is the process of constructing an imaginary world or setting (narrative), setting, sometimes associated with a fictional universe. Developing the world with coherent qualities such as a history, geography, culture and ecology is a k ...
. The expression ''planned language'' is sometimes used to indicate international auxiliary languages and other languages designed for actual use in human communication. Some prefer it to the adjective ''artificial'', as this term may be perceived as pejorative. Outside
Esperanto culture Esperanto culture refers to the shared cultural experience of the Esperantujo, or Esperanto-speaking community. Despite being a constructed language, Esperanto has a history dating back to the late 19th century, and shared socio-cultural mores ha ...
, the term
language planning In sociolinguistics, language planning (also known as language engineering) is a deliberate effort to influence the function, structure or acquisition of languages or language varieties within a speech community.Kaplan B., Robert, and Rich ...
means the prescriptions given to a natural language to standardize it; in this regard, even a "natural language" may be artificial in some respects, meaning some of its words have been crafted by conscious decision. Prescriptive grammars, which date to ancient times for
classical language According to the definition by George L. Hart, a classical language is any language with an independent literary tradition and a large body of ancient written literature. Classical languages are usually extinct languages. Those that are still ...
s such as
Latin Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...
and
Sanskrit Sanskrit (; stem form ; nominal singular , ,) is a classical language belonging to the Indo-Aryan languages, Indo-Aryan branch of the Indo-European languages. It arose in northwest South Asia after its predecessor languages had Trans-cultural ...
, are rule-based codifications of natural languages, such codifications being a middle ground between naïve natural selection and development of language and its explicit construction. The term ''glossopoeia'' is also used to mean language construction, particularly construction of
artistic language An artistic language, or artlang, is a constructed language designed for aesthetic and phonetic pleasure. Constructed languages can be artistic to the extent that artists use it as a source of creativity in art, poetry, calligraphy or as a metapho ...
s.Sarah L. Higley: ''Hildegard of Bingen's Unknown Language''. Palgrave Macmillan, 2007. Conlang speakers are rare. For example, the Hungarian
census A census (from Latin ''censere'', 'to assess') is the procedure of systematically acquiring, recording, and calculating population information about the members of a given Statistical population, population, usually displayed in the form of stati ...
of 2011 found 8,397 speakers of
Esperanto Esperanto (, ) is the world's most widely spoken Constructed language, constructed international auxiliary language. Created by L. L. Zamenhof in 1887 to be 'the International Language' (), it is intended to be a universal second language for ...
, and the census of 2001 found 10 of
Romanid Romanid is a zonal auxiliary language for speakers of Romance languages, intended to be understandable to them without prior study. It was created by the Hungarian language teacher Zoltán Magyar Zoltán Magyar (born 13 December 1953) is a ...
, two each of
Interlingua Interlingua (, ) is an international auxiliary language (IAL) developed between 1937 and 1951 by the American International Auxiliary Language Association (IALA). It is a constructed language of the "naturalistic" variety, whose vocabulary, ...
and
Ido Ido () is a constructed language derived from a reformed version of Esperanto, and designed similarly with the goal of being a universal second language for people of diverse languages. To function as an effective ''international auxiliary ...
and one each of
Idiom Neutral Idiom Neutral is an international auxiliary language, published in 1902 by the International Academy of the Universal Language () under the leadership of Waldemar Rosenberger, a St. Petersburg engineer. History The Academy had its origin a ...
and Mundolinco. The
Russia Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...
n census of 2010 found that in Russia there were about 992 speakers of Esperanto (the 120th most common) and nine of the
Esperantido An Esperantido (plural Esperantidoj) is a constructed language derived from Esperanto. ''Esperantido'' originally referred to the language which is now known as Ido. The word ''Esperantido'' contains the affix (''-ido''), which means a "child (' ...
Ido Ido () is a constructed language derived from a reformed version of Esperanto, and designed similarly with the goal of being a universal second language for people of diverse languages. To function as an effective ''international auxiliary ...
.


Planned, constructed, artificial

The terms "planned", "constructed", "invented", "fictional", and "artificial" are used differently in some traditions. For example, few speakers of
Interlingua Interlingua (, ) is an international auxiliary language (IAL) developed between 1937 and 1951 by the American International Auxiliary Language Association (IALA). It is a constructed language of the "naturalistic" variety, whose vocabulary, ...
consider their language artificial, since they assert that it has no invented content: Interlingua's vocabulary is taken from a small set of natural languages, and its grammar is based closely on these source languages, even including some degree of irregularity; its proponents prefer to describe its vocabulary and grammar as standardized rather than artificial or constructed. Similarly,
Latino sine flexione Latino sine flexione ("Latin without inflections"), Interlingua de Academia pro Interlingua (IL de ApI) or Peano's Interlingua (abbreviated as IL) is an international auxiliary language compiled by the Academia pro Interlingua under the chairmansh ...
(LsF) is a simplification of Latin from which the
inflection In linguistic Morphology (linguistics), morphology, inflection (less commonly, inflexion) is a process of word formation in which a word is modified to express different grammatical category, grammatical categories such as grammatical tense, ...
s have been removed. As with Interlingua, some prefer to describe its development as "planning" rather than "constructing". Some speakers of
Esperanto Esperanto (, ) is the world's most widely spoken Constructed language, constructed international auxiliary language. Created by L. L. Zamenhof in 1887 to be 'the International Language' (), it is intended to be a universal second language for ...
and
Esperantido An Esperantido (plural Esperantidoj) is a constructed language derived from Esperanto. ''Esperantido'' originally referred to the language which is now known as Ido. The word ''Esperantido'' contains the affix (''-ido''), which means a "child (' ...
s also avoid the term "artificial language" because they deny that there is anything "unnatural" about the use of their language in human communication. By contrast, some philosophers have argued that all human languages are conventional or artificial.
François Rabelais François Rabelais ( , ; ; born between 1483 and 1494; died 1553) was a French writer who has been called the first great French prose author. A Renaissance humanism, humanist of the French Renaissance and Greek scholars in the Renaissance, Gr ...
's fictional giant Pantagruel, for instance, said: "It is a misuse of terms to say that we have natural language; languages ''exist'' through arbitrary institutions and the conventions of peoples. Voices, as the dialecticians say, don't signify naturally, but capriciously." Furthermore, fictional or experimental languages can be considered ''naturalistic'' if they model real world languages. For example, if a naturalistic conlang is derived ''a posteriori'' from another language (real or constructed), it should imitate natural processes of
phonological Phonology (formerly also phonemics or phonematics: "phonemics ''n.'' 'obsolescent''1. Any procedure for identifying the phonemes of a language from a corpus of data. 2. (formerly also phonematics) A former synonym for phonology, often prefer ...
, lexical, and
grammatical In linguistics, grammaticality is determined by the conformity to language usage as derived by the grammar of a particular speech variety. The notion of grammaticality rose alongside the theory of generative grammar, the goal of which is to formu ...
change. In contrast with languages such as Interlingua, naturalistic fictional languages are not usually intended for easy learning or communication. Thus, naturalistic fictional languages tend to be more difficult and complex. While Interlingua has simpler grammar, syntax, and orthography than its source languages (though more complex and irregular than Esperanto or its descendants), naturalistic fictional languages typically mimic behaviors of natural languages like
irregular verbs A regular verb is any verb whose Verb conjugation, conjugation follows the typical pattern, or one of the typical patterns, of the language to which it belongs. A verb whose conjugation follows a different pattern is called an irregular verb. Th ...
and nouns, and complicated phonological processes.


Overview

In terms of purpose, most constructed languages can broadly be divided into: *''
Engineered language Engineered languages (often abbreviated to engelangs, or, less commonly, engilangs) are constructed languages devised to test or prove some hypotheses about how languages work or might work. There are at least three subcategories, philosophical ...
s'' (''engelangs''), further subdivided into logical languages (''loglangs''),
philosophical language A philosophical language is any constructed language that is constructed from first principles, sometimes following a classification. It is considered a type of engineered language. Philosophical languages were popular in Early Modern times, partl ...
s and experimental languages, devised for experimentation in
logic Logic is the study of correct reasoning. It includes both formal and informal logic. Formal logic is the study of deductively valid inferences or logical truths. It examines how conclusions follow from premises based on the structure o ...
,
philosophy Philosophy ('love of wisdom' in Ancient Greek) is a systematic study of general and fundamental questions concerning topics like existence, reason, knowledge, Value (ethics and social sciences), value, mind, and language. It is a rational an ...
, or
linguistics Linguistics is the scientific study of language. The areas of linguistic analysis are syntax (rules governing the structure of sentences), semantics (meaning), Morphology (linguistics), morphology (structure of words), phonetics (speech sounds ...
; *'' Auxiliary languages'' (''auxlangs'') or ''IALs'' (for ''International Auxiliary Languages''), devised for interlinguistic or international communication; *''
Artistic language An artistic language, or artlang, is a constructed language designed for aesthetic and phonetic pleasure. Constructed languages can be artistic to the extent that artists use it as a source of creativity in art, poetry, calligraphy or as a metapho ...
s'' (''artlangs''), devised to create aesthetic pleasure or humorous effect (''secret languages'' and ''mystical languages'' are also usually classified as artistic languages). The boundaries between these categories are by no means clear. A constructed language could easily fall into more than one of the above categories. A logical language created for
aesthetic Aesthetics (also spelled esthetics) is the branch of philosophy concerned with the nature of beauty and taste, which in a broad sense incorporates the philosophy of art.Slater, B. H.Aesthetics ''Internet Encyclopedia of Philosophy,'' , acces ...
reasons would also be classifiable as an artistic language; one created with philosophical motives could include being used as an auxiliary language. There are no rules, either inherent in the process of language construction or externally imposed, that would limit a constructed language to fitting only one of the above categories. A constructed language can have native speakers if young children learn it from parents who speak it fluently. According to ''
Ethnologue ''Ethnologue: Languages of the World'' is an annual reference publication in print and online that provides statistics and other information on the living languages of the world. It is the world's most comprehensive catalogue of languages. It w ...
'', there are "200–2000 who speak Esperanto as a first language". A member of the Klingon Language Institute, d'Armond Speers, attempted to raise his son as a native (bilingual with English)
Klingon The Klingons ( ; Klingon language, Klingon: ''tlhIngan'' ) are a humanoid species of aliens in the science fiction franchise ''Star Trek''. Developed by screenwriter Gene L. Coon in 1967 for the Star Trek: The Original Series, original ''Star T ...
speaker. As soon as a constructed language has a community of fluent speakers, especially if it has numerous native speakers, it begins to evolve and hence loses its constructed status. For example,
Modern Hebrew Modern Hebrew (, or ), also known as Israeli Hebrew or simply Hebrew, is the Standard language, standard form of the Hebrew language spoken today. It is the only surviving Canaanite language, as well as one of the List of languages by first w ...
and its pronunciation norms were developed from existing traditions of
Hebrew Hebrew (; ''ʿÎbrit'') is a Northwest Semitic languages, Northwest Semitic language within the Afroasiatic languages, Afroasiatic language family. A regional dialect of the Canaanite languages, it was natively spoken by the Israelites and ...
, such as
Mishnaic Hebrew Mishnaic Hebrew () is the Hebrew language used in Talmudic texts. Mishnaic Hebrew can be sub-divided into Mishnaic Hebrew proper (c. 1–200 CE, also called Tannaim, Tannaitic Hebrew, Early Rabbinic Hebrew, or Mishnah, Mishnaic Hebrew I), which w ...
and
Biblical Hebrew Biblical Hebrew ( or ), also called Classical Hebrew, is an archaic form of the Hebrew language, a language in the Canaanite languages, Canaanitic branch of the Semitic languages spoken by the Israelites in the area known as the Land of Isra ...
following a general
Sephardic Sephardic Jews, also known as Sephardi Jews or Sephardim, and rarely as Iberian Peninsular Jews, are a Jewish diaspora population associated with the historic Jewish communities of the Iberian Peninsula (Spain and Portugal) and their descendant ...
pronunciation, rather than engineered from scratch, and has undergone considerable changes since the state of
Israel Israel, officially the State of Israel, is a country in West Asia. It Borders of Israel, shares borders with Lebanon to the north, Syria to the north-east, Jordan to the east, Egypt to the south-west, and the Mediterranean Sea to the west. Isr ...
was founded in 1948 (Hetzron 1990:693). However, linguist
Ghil'ad Zuckermann Ghil'ad Zuckermann (, ; ) is an Israeli-born language revivalist and linguist who works in contact linguistics, lexicology and the study of language, culture and identity. Zuckermann was awarded the Rubinlicht Prize (2023) "for his researc ...
argues that Modern Hebrew, which he terms "Israeli", is a Semito-European hybrid based not only on Hebrew but also on
Yiddish Yiddish, historically Judeo-German, is a West Germanic language historically spoken by Ashkenazi Jews. It originated in 9th-century Central Europe, and provided the nascent Ashkenazi community with a vernacular based on High German fused with ...
and other languages spoken by revivalists. Zuckermann therefore endorses the translation of the Hebrew Bible into what he calls "Israeli".
Esperanto Esperanto (, ) is the world's most widely spoken Constructed language, constructed international auxiliary language. Created by L. L. Zamenhof in 1887 to be 'the International Language' (), it is intended to be a universal second language for ...
as a living spoken language has evolved significantly from the prescriptive blueprint published in 1887, so that modern editions of the ''Fundamenta Krestomatio'', a 1903 collection of early texts in the language, require many footnotes on the syntactic and lexical differences between early and modern Esperanto. Proponents of constructed languages often have many reasons for using them. The famous but disputed Sapir–Whorf hypothesis is sometimes cited; this claims that the language one speaks influences the way one thinks. Thus, a "better" language should allow the speaker to think more clearly or intelligently or to encompass more points of view; this was the intention of Suzette Haden Elgin in creating Láadan, a feminist language embodied in her feminist science fiction series '' Native Tongue''. Constructed languages have been included in
standardized test A standardized test is a Test (assessment), test that is administered and scored in a consistent or standard manner. Standardized tests are designed in such a way that the questions and interpretations are consistent and are administered and scored ...
s such as the
SAT The SAT ( ) is a standardized test widely used for college admissions in the United States. Since its debut in 1926, its name and Test score, scoring have changed several times. For much of its history, it was called the Scholastic Aptitude Test ...
, where they were used to test the applicant's ability to infer and apply grammatical rules. By the same token, a constructed language might also be used to ''restrict'' thought, as in
George Orwell Eric Arthur Blair (25 June 1903 – 21 January 1950) was an English novelist, poet, essayist, journalist, and critic who wrote under the pen name of George Orwell. His work is characterised by lucid prose, social criticism, opposition to a ...
's
Newspeak In the dystopian novel '' Nineteen Eighty-Four'' (also published as ''1984''), by George Orwell, Newspeak is the fictional language of Oceania, a totalitarian superstate. To meet the ideological requirements of Ingsoc (English Socialism) in O ...
, or to ''simplify'' thought, as in
Toki Pona Toki Pona (; , , translated as 'the language of good') is a Philosophical language, philosophical, Artistic language, artistic, constructed language designed for its small vocabulary, simplicity, and ease of acquisition. It was created by Canadia ...
. However, linguists such as
Steven Pinker Steven Arthur Pinker (born September 18, 1954) is a Canadian-American cognitive psychology, cognitive psychologist, psycholinguistics, psycholinguist, popular science author, and public intellectual. He is an advocate of evolutionary psycholo ...
argue that ideas exist independently of language. For example, in the book ''
The Language Instinct ''The Language Instinct: How the Mind Creates Language'' is a 1994 book by Steven Pinker, written for a general audience. Pinker argues that humans are born with an innate capacity for language. He deals sympathetically with Noam Chomsky's claim t ...
'', Pinker states that children spontaneously re-invent slang and even grammar with each generation. These linguists argue that attempts to control the range of human thought through the reform of language would fail, as concepts like "freedom" will reappear in new words if the old words vanish. Proponents claim a particular language makes it easier to express and understand concepts in one area, and more difficult in others. An example can be taken from the way various
programming language A programming language is a system of notation for writing computer programs. Programming languages are described in terms of their Syntax (programming languages), syntax (form) and semantics (computer science), semantics (meaning), usually def ...
s make it easier to write certain kinds of programs and harder to write others. Another reason cited for using a constructed language is the telescope rule, which claims that it takes less time to first learn a simple constructed language and then a natural language, than to learn only a natural language. Thus, if someone wants to learn English, some suggest learning
Basic English Basic English (a backronym for British American Scientific International and Commercial English) is a controlled language based on standard English, but with a greatly simplified vocabulary and grammar. It was created by the linguist and philo ...
first. Constructed languages like Esperanto and Interlingua are in fact often simpler due to the typical lack of
irregular verbs A regular verb is any verb whose Verb conjugation, conjugation follows the typical pattern, or one of the typical patterns, of the language to which it belongs. A verb whose conjugation follows a different pattern is called an irregular verb. Th ...
and other grammatical quirks. Some studies have found that learning Esperanto helps in learning a non-constructed language later (see propaedeutic value of Esperanto). Codes for constructed languages include the
ISO 639-2 ISO 639-2:1998, ''Codes for the representation of names of languages — Part 2: Alpha-3 code'', is the second part of the ISO 639 International standard, standard, which lists Language code, codes for the representation of the names of languages ...
"
art Art is a diverse range of cultural activity centered around ''works'' utilizing creative or imaginative talents, which are expected to evoke a worthwhile experience, generally through an expression of emotional power, conceptual ideas, tec ...
" for conlangs; however, some constructed languages have their own
ISO 639 ISO 639 is a international standard, standard by the International Organization for Standardization (ISO) concerned with representation of languages and language groups. It currently consists of four sets (1-3, 5) of code, named after each part w ...
language codes (e.g. "eo" and "epo" for
Esperanto Esperanto (, ) is the world's most widely spoken Constructed language, constructed international auxiliary language. Created by L. L. Zamenhof in 1887 to be 'the International Language' (), it is intended to be a universal second language for ...
, "jbo" for
Lojban Lojban (pronounced ) is a Logical language, logical, constructed language, constructed, human language created by the Logical Language Group which aims to be Syntactic ambiguity, syntactically unambiguous. It succeeds the Loglan project. The Log ...
, "ia" and "ina" for
Interlingua Interlingua (, ) is an international auxiliary language (IAL) developed between 1937 and 1951 by the American International Auxiliary Language Association (IALA). It is a constructed language of the "naturalistic" variety, whose vocabulary, ...
, "tlh" for
Klingon The Klingons ( ; Klingon language, Klingon: ''tlhIngan'' ) are a humanoid species of aliens in the science fiction franchise ''Star Trek''. Developed by screenwriter Gene L. Coon in 1967 for the Star Trek: The Original Series, original ''Star T ...
, "io" and "ido" for
Ido Ido () is a constructed language derived from a reformed version of Esperanto, and designed similarly with the goal of being a universal second language for people of diverse languages. To function as an effective ''international auxiliary ...
, "lfn" for
Lingua Franca Nova Lingua Franca Nova (), abbreviated as LFN and known colloquially as Elefen, is a constructed international auxiliary language originally created by C. George Boeree of Shippensburg University, Pennsylvania, and further developed by many of its ...
, and "tok" for
Toki Pona Toki Pona (; , , translated as 'the language of good') is a Philosophical language, philosophical, Artistic language, artistic, constructed language designed for its small vocabulary, simplicity, and ease of acquisition. It was created by Canadia ...
). One constraint on a constructed language is that if it was constructed to be a natural language for use by fictional foreigners or aliens, as with Dothraki and High Valyrian in the ''
Game of Thrones ''Game of Thrones'' is an American Fantasy television, fantasy Drama (film and television), drama television series created by David Benioff and for HBO. It is an adaptation of ''A Song of Ice and Fire'', a series of high fantasy novels by ...
'' series, which was adapted from the ''
A Song of Ice and Fire ''A Song of Ice and Fire'' is a series of high fantasy novels by the American author George R. R. Martin. Martin began writing the first volume, ''A Game of Thrones'', in 1991, and published it in 1996. Martin, who originally envisioned the ser ...
'' book series, the language should be easily pronounced by actors, and should fit with and incorporate any fragments of the language already invented by the book's author, and preferably also fit with any personal names of fictional speakers of the language.


''A priori'' and ''a posteriori'' languages

An ''a priori'' (from
Latin Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...
''
a priori ('from the earlier') and ('from the later') are Latin phrases used in philosophy to distinguish types of knowledge, Justification (epistemology), justification, or argument by their reliance on experience. knowledge is independent from any ...
'', "from the former") constructed language is one whose features (including vocabulary, grammar, etc.) are not based on an existing language, and an ''a posteriori'' language is the opposite. This categorization, however, is not absolute, as many constructed languages may be called ''a priori'' when considering some linguistic factors, and at the same time ''a posteriori'' when considering other factors.


''A priori'' language

An ''a priori'' language is any constructed language with some features which are not based on existing languages. Instead these features are invented or elaborated to work differently or to allude to different purposes. Some ''a priori'' languages are designed to be
international auxiliary language An international auxiliary language (sometimes acronymized as IAL or contracted as auxlang) is a language meant for communication between people from different nations, who do not share a common first language. An auxiliary language is primarily a ...
s that remove what could be considered an unfair learning advantage for native speakers of a source language that would otherwise exist for ''a posteriori'' languages. Others, known as
philosophical Philosophy ('love of wisdom' in Ancient Greek) is a systematic study of general and fundamental questions concerning topics like existence, reason, knowledge, Value (ethics and social sciences), value, mind, and language. It is a rational an ...
or taxonomic languages, try to categorize their vocabulary, either to express an underlying philosophy or to make it easier to recognize new vocabulary. Finally, many artistic languages, created for either personal use or for use in a fictional medium, employ consciously constructed grammars and vocabularies, and are best understood as ''a priori''.


Examples of ''a priori'' languages


=''A priori'' international auxiliary languages

= *
Balaibalan Balaibalan () is the oldest known constructed language. History Balaibalan is the only well-documented early constructed language that is not of European origin, and it is independent of the fashion for language construction that occurred in ...
, attributed to
Fazlallah Astarabadi Fażlu l-Lāh Astar-Ābādī (, 1339/40 in Astarābād – 1394 in Nakhchivan), also known as Fażlullāh Tabrīzī AstarābādīIrène Mélikoff. ''Hadji Bektach: un mythe et ses avatars : genèse et évolution du soufisme populaire en Turquie' ...
or Muhyi Gulshani (14th century) *
Solresol Solresol (Solfège: G (musical note), Sol-D (musical note), Re-G (musical note), Sol), originally called Langue universelle and then Langue musicale universelle, is a Musical language, musical constructed language devised by François Sudre, beg ...
by François Sudre (1827) * Ro by Edward Foster (1906) * Sona by Kenneth Searight (1935) * Babm by Rikichi Okamoto (1962) * aUI by W. John Weilgart (1962) * Mirad (aka Unilingua) by Noubar Agopoff (1966) * Kotava by Staren Fetcey (1978)


=Experimental languages

= * Láadan by Suzette Haden Elgin (1982) *
Ithkuil Ithkuil is an experimental language, experimental constructed language created by John Quijada. It is designed to express more profound levels of human cognition briefly yet overtly and clearly, particularly about human categorization. It is a cr ...
by John Quijada (2004)


=''A priori'' artistic languages

= *
Quenya Quenya ()Tolkien wrote in his "Outline of Phonology" (in '' Parma Eldalamberon'' 19, p. 74) dedicated to the phonology of Quenya: is "a sound as in English ''new''". In Quenya is a combination of consonants, ibidem., p. 81. is a constructed l ...
and Sindarin by
J. R. R. Tolkien John Ronald Reuel Tolkien (, 3 January 1892 – 2 September 1973) was an English writer and philologist. He was the author of the high fantasy works ''The Hobbit'' and ''The Lord of the Rings''. From 1925 to 1945, Tolkien was the Rawlinson ...
for ''
The Lord of the Rings ''The Lord of the Rings'' is an Epic (genre), epic high fantasy novel written by English author and scholar J. R. R. Tolkien. Set in Middle-earth, the story began as a sequel to Tolkien's 1937 children's book ''The Hobbit'' but eventually d ...
'' (published 1954) *
Klingon The Klingons ( ; Klingon language, Klingon: ''tlhIngan'' ) are a humanoid species of aliens in the science fiction franchise ''Star Trek''. Developed by screenwriter Gene L. Coon in 1967 for the Star Trek: The Original Series, original ''Star T ...
by
Marc Okrand Marc Okrand (; born July 3, 1948) is an American linguist. His professional work is in Native American languages, and he is well known as the creator of the Klingon language in the ''Star Trek'' science fiction franchise. Career As a linguist, ...
for the science-fiction franchise ''
Star Trek ''Star Trek'' is an American science fiction media franchise created by Gene Roddenberry, which began with the Star Trek: The Original Series, series of the same name and became a worldwide Popular culture, pop-culture Cultural influence of ...
'' (1985) * Kēlen by Sylvia Sotomayor (1998) * Naʼvi by Paul Frommer for the movie ''
Avatar Avatar (, ; ) is a concept within Hinduism that in Sanskrit literally means . It signifies the material appearance or incarnation of a powerful deity, or spirit on Earth. The relative verb to "alight, to make one's appearance" is sometimes u ...
'' (2009) * Dothraki and Valyrian by
David Peterson David Robert Peterson (born December 28, 1943) is a Canadian lawyer and former politician who served as the 20th premier of Ontario from 1985 to 1990. He was the first Liberal officeholder in 42 years, ending the so-called Tory dynasty. Back ...
for the television series ''
Game of Thrones ''Game of Thrones'' is an American Fantasy television, fantasy Drama (film and television), drama television series created by David Benioff and for HBO. It is an adaptation of ''A Song of Ice and Fire'', a series of high fantasy novels by ...
'' (2011) * Kiliki by Madhan Karky for the '' Baahubali'' films (2015)


=Community languages

= *
Damin Damin ( in the practical orthography of Lardil) was a ceremonial language register used by the advanced initiated men of the aboriginal Lardil ( in the practical orthography) and Yangkaal peoples of northern Australia. Both inhabit island ...
( Yangkaal and Lardil people, 19th century or earlier) * Eskayan ( Eskaya, ) * Medefaidrin ( Ibibio, 1930s) *
Palawa kani Palawa kani is a constructed language created by the Tasmanian Aboriginal Centre as a composite Tasmanian languages, Tasmanian language, based on reconstructed vocabulary from the limited accounts of the various languages once spoken by the Abo ...
( Palawa, 1990s)


''A posteriori'' language

An ''a posteriori'' language (from
Latin Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...
''a posteriori'', "from the latter"), according to French linguist
Louis Couturat Louis Couturat (; 17 January 1868 – 3 August 1914) was a French logician, mathematician, philosopher, and linguist. Couturat was a pioneer of the constructed language Ido. Life and education Born in Paris. In 1887 he entered École Normale S ...
, is any constructed language whose elements are borrowed from or based on existing languages. The term can also be extended to controlled versions of natural languages, and is most commonly used to refer to vocabulary despite other features. Likewise, zonal auxiliary languages (auxiliary languages for speakers of a particular language family) are ''a posteriori'' by definition. While most auxiliary languages are ''a posteriori'' due to their intended function as a medium of communication, many artistic languages are fully ''a posteriori'' in design—many for the purposes of
alternate history Alternate history (also referred to as alternative history, allohistory, althist, or simply A.H.) is a subgenre of speculative fiction in which one or more historical events have occurred but are resolved differently than in actual history. As ...
. In distinguishing whether the language is ''a priori'' or ''a posteriori'', the prevalence and distribution of respectable traits is often the key.


Examples of ''a posteriori'' languages


=''A posteriori'' artistic languages

= * Brithenig by Andrew Smith (1996) * Atlantean by
Marc Okrand Marc Okrand (; born July 3, 1948) is an American linguist. His professional work is in Native American languages, and he is well known as the creator of the Klingon language in the ''Star Trek'' science fiction franchise. Career As a linguist, ...
for the film '' Atlantis: The Lost Empire'' (2001) *
Toki Pona Toki Pona (; , , translated as 'the language of good') is a Philosophical language, philosophical, Artistic language, artistic, constructed language designed for its small vocabulary, simplicity, and ease of acquisition. It was created by Canadia ...
by Sonja Lang (2001) * Wenedyk by
Jan van Steenbergen Johannes Hendrik "Jan" van Steenbergen (; born June 3, 1970) is a Dutch translator and interpreter. He is known for being the author of several constructed languages, notably Interslavic and Wenedyk. He was born in Hoorn, where he spent most of ...
(2002) * Trigedasleng by
David Peterson David Robert Peterson (born December 28, 1943) is a Canadian lawyer and former politician who served as the 20th premier of Ontario from 1985 to 1990. He was the first Liberal officeholder in 42 years, ending the so-called Tory dynasty. Back ...
for the TV series '' The 100'' (2014) * Nagwai by Naxikeestan (2023)


=Controlled auxiliary languages

= *
Latino sine flexione Latino sine flexione ("Latin without inflections"), Interlingua de Academia pro Interlingua (IL de ApI) or Peano's Interlingua (abbreviated as IL) is an international auxiliary language compiled by the Academia pro Interlingua under the chairmansh ...
(Latin, 1911) *
Basic English Basic English (a backronym for British American Scientific International and Commercial English) is a controlled language based on standard English, but with a greatly simplified vocabulary and grammar. It was created by the linguist and philo ...
(English, 1925) *
N'Ko NKo (ߒߞߏ), also spelled N'Ko, is an alphabetic script devised by Solomana Kante, Solomana Kanté in 1949, as a modern writing system for the Manding languages of West Africa. The term ''NKo'', which means ''I say'' in all Manding languages, i ...
(Manding, 1949) * Learning English (English, 1959) * Kitara (SW Ugandan Bantu, 1990) * Globish (English, 2004)


=''A posteriori'' international auxiliary languages

= * (1868) Universalglot * (1879)
Volapük Volapük (; , 'Language of the World', or lit. 'World Speak') is a constructed language created in 1879 and 1880 by Johann Martin Schleyer, a Roman Catholic priest in Baden, Germany, who believed that God told him to create an international lang ...
* (1885) Pasilingua * (1887)
Esperanto Esperanto (, ) is the world's most widely spoken Constructed language, constructed international auxiliary language. Created by L. L. Zamenhof in 1887 to be 'the International Language' (), it is intended to be a universal second language for ...
* (1888) Mundolinco * (1902)
Idiom Neutral Idiom Neutral is an international auxiliary language, published in 1902 by the International Academy of the Universal Language () under the leadership of Waldemar Rosenberger, a St. Petersburg engineer. History The Academy had its origin a ...
* (1907)
Ido Ido () is a constructed language derived from a reformed version of Esperanto, and designed similarly with the goal of being a universal second language for people of diverse languages. To function as an effective ''international auxiliary ...
* (1912) Reform-Neutral * (1922)
Interlingue Interlingue (; ISO 639 ''ie'', ''ile''), originally Occidental (), is an international auxiliary language created in 1922 and renamed in 1949. Its creator, Edgar de Wahl, sought to achieve maximal Grammaticality, grammatical regularity and Na ...
* (1928)
Novial Novial is an international auxiliary language (IAL) created by Danish linguist Otto Jespersen in 1928. It was designed to facilitate human communication between speakers of different native languages. The name of the language is a blend of the ...
* (1937) Esperanto II * () Mondial * (1951)
Interlingua Interlingua (, ) is an international auxiliary language (IAL) developed between 1937 and 1951 by the American International Auxiliary Language Association (IALA). It is a constructed language of the "naturalistic" variety, whose vocabulary, ...
* (1961) Neo * (1970) Afrihili * ()
Glosa Glosa is a constructed international auxiliary language based on Interglossa (a previous ''draft of an auxiliary'' published in 1943). The first Glosa dictionary was published 1978. The name of the language comes from the Greek root ''glossa'' m ...
* (1986) Uropi * (1991) Romániço * (1998)
Lingua Franca Nova Lingua Franca Nova (), abbreviated as LFN and known colloquially as Elefen, is a constructed international auxiliary language originally created by C. George Boeree of Shippensburg University, Pennsylvania, and further developed by many of its ...
* (2007) Sambahsa * (2010) Lingwa de planeta


=Zonal auxiliary languages

= * Efatese (c. Vanuatu Oceanic, 19th century) *
Romanid Romanid is a zonal auxiliary language for speakers of Romance languages, intended to be understandable to them without prior study. It was created by the Hungarian language teacher Zoltán Magyar Zoltán Magyar (born 13 December 1953) is a ...
(Romance, 1956) *
Palawa kani Palawa kani is a constructed language created by the Tasmanian Aboriginal Centre as a composite Tasmanian languages, Tasmanian language, based on reconstructed vocabulary from the limited accounts of the various languages once spoken by the Abo ...
(Aboriginal Australian, 1992) * Folkspraak (Germanic, 1995) * Budinos (Finno-Ugric, 2000s) * Neolatino Romance (Romance, 2006) * Interslavic (Slavic, 2011)


History


Ancient linguistic experiments

Grammatical speculation dates from
Classical Antiquity Classical antiquity, also known as the classical era, classical period, classical age, or simply antiquity, is the period of cultural History of Europe, European history between the 8th century BC and the 5th century AD comprising the inter ...
; for instance, it appears in
Plato Plato ( ; Greek language, Greek: , ; born  BC, died 348/347 BC) was an ancient Greek philosopher of the Classical Greece, Classical period who is considered a foundational thinker in Western philosophy and an innovator of the writte ...
's '' Cratylus'' in Hermogenes's contention that words are not inherently linked to what they refer to; that people apply "a piece of their own voice ... to the thing".
Athenaeus Athenaeus of Naucratis (, or Nαυκράτιος, ''Athēnaios Naukratitēs'' or ''Naukratios''; ) was an ancient Greek rhetorician and Grammarian (Greco-Roman), grammarian, flourishing about the end of the 2nd and beginning of the 3rd century ...
tells the story of two figures: Dionysius of Sicily and Alexarchus: * Dionysius of Sicily created
neologism In linguistics, a neologism (; also known as a coinage) is any newly formed word, term, or phrase that has achieved popular or institutional recognition and is becoming accepted into mainstream language. Most definitively, a word can be considered ...
s like ''menandros'' "virgin" (from ''menei'' "waiting" and ''andra'' "husband") for standard Greek ''parthenos''; ''menekratēs'' "pillar" (from ''menei'' "it remains in one place" and ''kratei'' "it is strong") for standard ''stulos''; and ''ballantion'' "javelin" (from ''balletai enantion'' "thrown against someone") for standard ''akon''. *
Alexarchus of Macedon Alexarchus or Alexarch (Greek: ) was an Ancient Macedonian scholar and officer, son of Antipater and brother of Cassander. He lived around 350 to 290 BC. He is mentioned as the founder of a utopian town called Ouranopolis, in Chalcidice. Her ...
, the brother of King
Cassander Cassander (; ; 355 BC – 297 BC) was king of the Ancient Greek kingdom of Macedonia from 305 BC until 297 BC, and '' de facto'' ruler of southern Greece from 317 BC until his death. A son of Antipater and a contemporary of Alexander the ...
of Macedon, was the founder of the city of Ouranopolis. Athenaeus recounts a story told by Heraclides of Lembos that Alexarchus "introduced a peculiar vocabulary, referring to a rooster as a "dawn-crier", a barber as a "mortal-shaver", a drachma as "worked silver", ... and a herald as an ''aputēs'' rom ''ēputa'' "loud-voiced" "He lexarchusonce wrote something ... to the public authorities in Casandreia... As for what this letter says, in my opinion not even the Pythian god could make sense of it." While the mechanisms of grammar suggested by classical philosophers were designed to explain existing languages (
Latin Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...
,
Greek Greek may refer to: Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group *Greek language, a branch of the Indo-European language family **Proto-Greek language, the assumed last common ancestor of all kno ...
, and
Sanskrit Sanskrit (; stem form ; nominal singular , ,) is a classical language belonging to the Indo-Aryan languages, Indo-Aryan branch of the Indo-European languages. It arose in northwest South Asia after its predecessor languages had Trans-cultural ...
), they were not used to construct new grammars. Roughly contemporary to Plato, in his descriptive grammar of Sanskrit,
Pāṇini (; , ) was a Sanskrit grammarian, logician, philologist, and revered scholar in ancient India during the mid-1st millennium BCE, dated variously by most scholars between the 6th–5th and 4th century BCE. The historical facts of his life ar ...
constructed a set of rules for explaining language, so that the text of his grammar may be considered a mixture of natural and constructed language.


Early constructed languages

A legend recorded in the seventh-century Irish work
Auraicept na n-Éces ''Auraicept na nÉces'' (; "The Scholars' Primer" ) is an Old Irish text on language and grammar. The core of the text may date to the early eighth century, but much material was added between that date and the production of the earliest surviv ...
claims that Fénius Farsaid visited Shinar after the confusion of tongues, and he and his scholars studied the various languages for ten years, taking the best features of each to create ''in Bérla tóbaide'' ("the selected language"), which he named ''Goídelc''—the Irish language. This appears to be the first mention of the concept of a constructed language in literature. The earliest non-natural languages were considered less "constructed" than "super-natural", mystical, or divinely inspired. The
Lingua Ignota A ''lingua ignota'' (Latin for "unknown language") was described by the 12th-century abbess Hildegard of Bingen, who apparently used it for mystical purposes. It consists of vocabulary with no known grammar; the only known text is individual ...
, recorded in the 12th century by St.
Hildegard of Bingen Hildegard of Bingen Benedictines, OSB (, ; ; 17 September 1179), also known as the Sibyl of the Rhine, was a German Benedictines, Benedictine abbess and polymath active as a writer, composer, philosopher, Christian mysticism, mystic, visiona ...
, is an example, and apparently the first entirely artificial language.Joshua Foer
"John Quijada and Ithkuil, the Language He Invented"
''
The New Yorker ''The New Yorker'' is an American magazine featuring journalism, commentary, criticism, essays, fiction, satire, cartoons, and poetry. It was founded on February 21, 1925, by Harold Ross and his wife Jane Grant, a reporter for ''The New York T ...
'', 24 December 2012.
It is a form of private mystical cant (see also Enochian). An important example from Middle-Eastern culture is
Balaibalan Balaibalan () is the oldest known constructed language. History Balaibalan is the only well-documented early constructed language that is not of European origin, and it is independent of the fashion for language construction that occurred in ...
, invented in the 16th century.
Kabbalistic Kabbalah or Qabalah ( ; , ; ) is an esoteric method, discipline and school of thought in Jewish mysticism. It forms the foundation of mystical religious interpretations within Judaism. A traditional Kabbalist is called a Mekubbal (). Jewi ...
grammatical speculation was directed at recovering the original language spoken by
Adam and Eve Adam and Eve, according to the creation myth of the Abrahamic religions, were the first man and woman. They are central to the belief that humanity is in essence a single family, with everyone descended from a single pair of original ancestors. ...
in
Paradise In religion and folklore, paradise is a place of everlasting happiness, delight, and bliss. Paradisiacal notions are often laden with pastoral imagery, and may be cosmogonical, eschatological, or both, often contrasted with the miseries of human ...
, lost in the confusion of tongues. The first
Christian A Christian () is a person who follows or adheres to Christianity, a Monotheism, monotheistic Abrahamic religion based on the life and teachings of Jesus in Christianity, Jesus Christ. Christians form the largest religious community in the wo ...
project for an ideal language is outlined in
Dante Alighieri Dante Alighieri (; most likely baptized Durante di Alighiero degli Alighieri; – September 14, 1321), widely known mononymously as Dante, was an Italian Italian poetry, poet, writer, and philosopher. His ''Divine Comedy'', originally called ...
's ''
De vulgari eloquentia ''De vulgari eloquentia'' (, ; "On eloquence in the vernacular") is the title of a Latin essay by Dante Alighieri. Although meant to consist of four books, it abruptly terminates in the middle of the second book. It was probably composed shortly ...
'', where he searches for the ideal
Italian Italian(s) may refer to: * Anything of, from, or related to the people of Italy over the centuries ** Italians, a Romance ethnic group related to or simply a citizen of the Italian Republic or Italian Kingdom ** Italian language, a Romance languag ...
vernacular suited for literature.
Ramon Llull Ramon Llull (; ; – 1316), sometimes anglicized as ''Raymond Lully'', was a philosopher, theologian, poet, missionary, Christian apologist and former knight from the Kingdom of Majorca. He invented a philosophical system known as the ''Art ...
's '' Ars Magna'' was a project of a perfect language with which the infidels could be convinced of the truth of the Christian faith. It was basically an application of
combinatorics Combinatorics is an area of mathematics primarily concerned with counting, both as a means and as an end to obtaining results, and certain properties of finite structures. It is closely related to many other areas of mathematics and has many ...
on a given set of concepts. During the
Renaissance The Renaissance ( , ) is a Periodization, period of history and a European cultural movement covering the 15th and 16th centuries. It marked the transition from the Middle Ages to modernity and was characterized by an effort to revive and sur ...
, Lullian and Kabbalistic ideas were drawn upon in a magical context, resulting in
cryptographic Cryptography, or cryptology (from "hidden, secret"; and ''graphein'', "to write", or '' -logia'', "study", respectively), is the practice and study of techniques for secure communication in the presence of adversarial behavior. More gen ...
applications.


Perfecting language

Renaissance interest in
Ancient Egypt Ancient Egypt () was a cradle of civilization concentrated along the lower reaches of the Nile River in Northeast Africa. It emerged from prehistoric Egypt around 3150BC (according to conventional Egyptian chronology), when Upper and Lower E ...
, notably the discovery of the '' Hieroglyphica'' of
Horapollo Horapollo (from Horus Apollo; ) (5th century?) is the supposed author of a treatise, titled ''Hieroglyphica'', on Egyptian hieroglyphs, extant in a Byzantine Greek language, Greek translation by one Philippus, also dating to 5th century. Life Hora ...
, and first encounters with the
Chinese script Chinese characters are logographs used Written Chinese, to write the Chinese languages and others from regions historically influenced by Chinese culture. Of the four independently invented writing systems accepted by scholars, they represe ...
directed efforts towards a perfect written language.
Johannes Trithemius Johannes Trithemius (; 1 February 1462 – 13 December 1516), born Johann Heidenberg, was a German Benedictine abbot and a polymath who was active in the German Renaissance as a Lexicography, lexicographer, chronicler, Cryptography, cryptograph ...
, in ''Steganographia'' and ''Polygraphia'', attempted to show how all languages can be reduced to one. In the 17th century, interest in magical languages was continued by the
Rosicrucians Rosicrucianism () is a spirituality, spiritual and cultural movement that arose in early modern Europe in the early 17th century after the publication of several texts announcing to the world a new Western esotericism, esoteric order. Rosicruc ...
and alchemists (like
John Dee John Dee (13 July 1527 – 1608 or 1609) was an English mathematician, astronomer, teacher, astrologer, occultist, and alchemist. He was the court astronomer for, and advisor to, Elizabeth I, and spent much of his time on alchemy, divination, ...
and his Enochian). Jakob Boehme in 1623 spoke of a "natural language" (''Natursprache'') of the senses.
Musical language Musical languages are constructed languages based on musical sounds, which tend to incorporate articulation. Whistled languages are dependent on an underlying spoken languages and are used in various cultures as a means for communication over dis ...
s from the Renaissance were often tied up with
mysticism Mysticism is popularly known as becoming one with God or the Absolute (philosophy), Absolute, but may refer to any kind of Religious ecstasy, ecstasy or altered state of consciousness which is given a religious or Spirituality, spiritual meani ...
, magic and
alchemy Alchemy (from the Arabic word , ) is an ancient branch of natural philosophy, a philosophical and protoscientific tradition that was historically practised in China, India, the Muslim world, and Europe. In its Western form, alchemy is first ...
, sometimes also referred to as the
language of the birds In Abrahamic and European mythology, medieval literature and occultism, the language of the birds is postulated as a mystical, perfect divine language, Adamic language, Enochian, angelic language or a mythical or magical language used by ...
. A non-mystic musical language was
Solresol Solresol (Solfège: G (musical note), Sol-D (musical note), Re-G (musical note), Sol), originally called Langue universelle and then Langue musicale universelle, is a Musical language, musical constructed language devised by François Sudre, beg ...
.


17th and 18th century: advent of philosophical languages

The 17th century saw the rise of projects for "philosophical" or "a priori" languages, such as: * Francis Lodwick's ''A Common Writing'' (1647) and ''The Groundwork or Foundation laid (or So Intended) for the Framing of a New Perfect Language and a Universal Common Writing'' (1652) * Sir
Thomas Urquhart Sir Thomas Urquhart (1611–1660) was a Scottish aristocrat, writer, and translator. He is best known for his translation of the works of French Renaissance writer François Rabelais to English. Biography Urquhart was born to Thomas Urquhar ...
's ''Ekskybalauron'' (1651) and ''Logopandecteision'' (1652) * George Dalgarno's ''Ars signorum'', 1661 *
John Wilkins John Wilkins (14 February 1614 – 19 November 1672) was an English Anglican ministry, Anglican clergyman, Natural philosophy, natural philosopher, and author, and was one of the founders of the Royal Society. He was Bishop of Chester from 1 ...
' '' An Essay towards a Real Character, and a Philosophical Language'', 1668 These early taxonomic conlangs produced systems of
hierarchical classification Hierarchical classification is a system of grouping things according to a hierarchy. In the field of machine learning, hierarchical classification is sometimes referred to as instance space decomposition, which splits a complete multi-class clas ...
that were intended to result in both spoken and written expression.
Leibniz Gottfried Wilhelm Leibniz (or Leibnitz; – 14 November 1716) was a German polymath active as a mathematician, philosopher, scientist and diplomat who is credited, alongside Sir Isaac Newton, with the creation of calculus in addition to many ...
had a similar purpose for his ''lingua generalis'' of 1678, aiming at a lexicon of characters upon which the user might perform calculations that would yield true propositions automatically, as a side-effect developing
binary calculus A binary number is a number expressed in the base-2 numeral system or binary numeral system, a method for representing numbers that uses only two symbols for the natural numbers: typically "0" (zero) and "1" (one). A ''binary number'' may also ...
. These projects were not only occupied with reducing or modelling grammar, but also with the arrangement of all human knowledge into "characters" or hierarchies, an idea that with the Enlightenment would ultimately lead to the ''
Encyclopédie , better known as ''Encyclopédie'' (), was a general encyclopedia published in France between 1751 and 1772, with later supplements, revised editions, and translations. It had many writers, known as the Encyclopédistes. It was edited by Denis ...
''. Many of these 17th–18th centuries conlangs were pasigraphies, or purely written languages with no spoken form or a spoken form that would vary greatly according to the native language of the reader.
Leopold Einstein Leopold Einstein (born Leopold Löb, 1833, died 8 September 1890 in Nuremberg) was a Jewish teacher, vendor, and writer. He was one of the early proponents of Esperanto. He was the first chairperson of the " Nürnberger Weltspracheverein", a Vo ...
, "Al la historio de la Provoj de Lingvoj Tutmondaj de Leibnitz ĝis la Nuna Tempo", 1884. Reprinted in ''Fundamenta Krestomatio'', UEA 1992 903
Leibniz and the encyclopedists realized that it is impossible to organize human knowledge unequivocally in a tree diagram, and consequently to construct an ''a priori'' language based on such a classification of concepts. Under the entry ''Charactère'',
D'Alembert Jean-Baptiste le Rond d'Alembert ( ; ; 16 November 1717 – 29 October 1783) was a French mathematician, mechanics, mechanician, physicist, philosopher, and music theorist. Until 1759 he was, together with Denis Diderot, a co-editor of the ''E ...
critically reviewed the projects of philosophical languages of the preceding century. After the ''Encyclopédie'', projects for ''a priori'' languages moved more and more to the lunatic fringe. Individual authors, typically unaware of the history of the idea, continued to propose taxonomic philosophical languages until the early 20th century (e.g. Ro), but most recent
engineered language Engineered languages (often abbreviated to engelangs, or, less commonly, engilangs) are constructed languages devised to test or prove some hypotheses about how languages work or might work. There are at least three subcategories, philosophical ...
s have had more modest goals; some are limited to a specific field, like mathematical formalism or calculus (e.g. Lincos and
programming language A programming language is a system of notation for writing computer programs. Programming languages are described in terms of their Syntax (programming languages), syntax (form) and semantics (computer science), semantics (meaning), usually def ...
s), others are designed for eliminating syntactical ambiguity (e.g.,
Loglan Loglan is a Logical language, logical constructed language originally designed for linguistic research, particularly for investigating the Sapir–Whorf hypothesis. The language was developed beginning in 1955 by Dr. James Cooke Brown with t ...
and
Lojban Lojban (pronounced ) is a Logical language, logical, constructed language, constructed, human language created by the Logical Language Group which aims to be Syntactic ambiguity, syntactically unambiguous. It succeeds the Loglan project. The Log ...
) or maximizing conciseness (e.g.,
Ithkuil Ithkuil is an experimental language, experimental constructed language created by John Quijada. It is designed to express more profound levels of human cognition briefly yet overtly and clearly, particularly about human categorization. It is a cr ...
).


19th and 20th centuries: auxiliary languages

Already in the ''
Encyclopédie , better known as ''Encyclopédie'' (), was a general encyclopedia published in France between 1751 and 1772, with later supplements, revised editions, and translations. It had many writers, known as the Encyclopédistes. It was edited by Denis ...
'' attention began to focus on ''a posteriori'' auxiliary languages. Joachim Faiguet de Villeneuve in the article on ''Langue'' wrote a short proposition of a "laconic" or regularized grammar of French. During the 19th century, a bewildering variety of such International Auxiliary Languages (IALs) were proposed, so that
Louis Couturat Louis Couturat (; 17 January 1868 – 3 August 1914) was a French logician, mathematician, philosopher, and linguist. Couturat was a pioneer of the constructed language Ido. Life and education Born in Paris. In 1887 he entered École Normale S ...
and Léopold Leau in ''Histoire de la langue universelle'' (1903) reviewed 38 projects. The first of these that made any international impact was
Volapük Volapük (; , 'Language of the World', or lit. 'World Speak') is a constructed language created in 1879 and 1880 by Johann Martin Schleyer, a Roman Catholic priest in Baden, Germany, who believed that God told him to create an international lang ...
, proposed in 1879 by
Johann Martin Schleyer Johann Martin Schleyer (; 18 July 183116 August 1912) was a German Priesthood in the Catholic Church, Catholic priest who invented the constructed language Volapük. His official name was "Martin Schleyer"; he added the name "Johann" (in honor o ...
; within a decade, 283 Volapükist clubs were counted all over the globe. However, disagreements between Schleyer and some prominent users of the language led to schism, and by the mid-1890s it fell into obscurity, making way for
Esperanto Esperanto (, ) is the world's most widely spoken Constructed language, constructed international auxiliary language. Created by L. L. Zamenhof in 1887 to be 'the International Language' (), it is intended to be a universal second language for ...
, proposed in 1887 by L. L. Zamenhof, and its descendants.
Interlingua Interlingua (, ) is an international auxiliary language (IAL) developed between 1937 and 1951 by the American International Auxiliary Language Association (IALA). It is a constructed language of the "naturalistic" variety, whose vocabulary, ...
, the most recent auxlang to gain a significant number of speakers, emerged in 1951, when the
International Auxiliary Language Association The International Auxiliary Language Association, Inc. (IALA) was an American organisation founded in 1924 to "promote widespread study, discussion and publicity of all questions involved in the establishment of an auxiliary language, together wi ...
published its
Interlingua–English Dictionary The ''Interlingua–English Dictionary'' (''IED''), developed by the International Auxiliary Language Association (IALA) under the direction of Alexander Gode and published by Storm Publishers in 1951, is the world's first Interlingua dictionary. ...
and an accompanying
grammar In linguistics, grammar is the set of rules for how a natural language is structured, as demonstrated by its speakers or writers. Grammar rules may concern the use of clauses, phrases, and words. The term may also refer to the study of such rul ...
. The success of Esperanto did not stop others from trying to construct new auxiliary languages, such as Leslie Jones' Eurolengo, which mixes elements of English and Spanish.
Loglan Loglan is a Logical language, logical constructed language originally designed for linguistic research, particularly for investigating the Sapir–Whorf hypothesis. The language was developed beginning in 1955 by Dr. James Cooke Brown with t ...
(1955) and its descendants constitute a pragmatic return to the aims of the ''a priori'' languages, tempered by the requirement of usability of an auxiliary language. Thus far, these modern ''a priori'' languages have garnered only small groups of speakers. Robot Interaction Language (2010) is a spoken language that is optimized for communication between machines and humans. The major goals of ROILA are that it should be easily learnable by the human user, and optimized for efficient recognition by computer
speech recognition Speech recognition is an interdisciplinary subfield of computer science and computational linguistics that develops methodologies and technologies that enable the recognition and translation of spoken language into text by computers. It is also ...
algorithms.


Artlangs

Artists may use language as a source of creativity in art, poetry, or calligraphy, or as a metaphor to address themes as cultural diversity and the vulnerability of the individual in a globalized world. Some people prefer however to take pleasure in constructing, crafting a language by a conscious decision for reasons of literary enjoyment or aesthetic reasons without any claim of usefulness. Such
artistic language An artistic language, or artlang, is a constructed language designed for aesthetic and phonetic pleasure. Constructed languages can be artistic to the extent that artists use it as a source of creativity in art, poetry, calligraphy or as a metapho ...
s begin to appear in
Early Modern The early modern period is a Periodization, historical period that is defined either as part of or as immediately preceding the modern period, with divisions based primarily on the history of Europe and the broader concept of modernity. There i ...
literature (in Pantagruel, and in
Utopia A utopia ( ) typically describes an imagined community or society that possesses highly desirable or near-perfect qualities for its members. It was coined by Sir Thomas More for his 1516 book ''Utopia (book), Utopia'', which describes a fictiona ...
n contexts), but they only seem to gain notability as serious projects beginning in the 20th century. '' A Princess of Mars'' (1912) by
Edgar Rice Burroughs Edgar Rice Burroughs (September 1, 1875 – March 19, 1950) was an American writer, best known for his prolific output in the adventure, science fiction, and fantasy genres. Best known for creating the characters Tarzan (who appeared in ...
was possibly the first fiction of that century to feature a constructed language.
J. R. R. Tolkien John Ronald Reuel Tolkien (, 3 January 1892 – 2 September 1973) was an English writer and philologist. He was the author of the high fantasy works ''The Hobbit'' and ''The Lord of the Rings''. From 1925 to 1945, Tolkien was the Rawlinson ...
developed families of related fictional languages and discussed artistic languages publicly, giving a lecture entitled "''
A Secret Vice "A Secret Vice", also known as "A Hobby for The Home", is a lecture first presented by English philologist and author J. R. R. Tolkien in 1931. The lecture concerns Tolkien's relations with and view on constructed languages, in particular on ...
''" in 1931 at a congress. (Orwell's Newspeak is considered a satire of an
international auxiliary language An international auxiliary language (sometimes acronymized as IAL or contracted as auxlang) is a language meant for communication between people from different nations, who do not share a common first language. An auxiliary language is primarily a ...
rather than an artistic language proper.) By the beginning of the first decade of the 21st century, it had become common for science fiction and fantasy works set in other worlds to feature constructed languages, or more commonly, an extremely limited but defined vocabulary which ''suggests'' the existence of a complete language, or whatever portions of the language are needed for the story. Constructed languages are a regular part of the genre, appearing in ''
Star Wars ''Star Wars'' is an American epic film, epic space opera media franchise created by George Lucas, which began with the Star Wars (film), eponymous 1977 film and Cultural impact of Star Wars, quickly became a worldwide popular culture, pop cu ...
'', ''
Star Trek ''Star Trek'' is an American science fiction media franchise created by Gene Roddenberry, which began with the Star Trek: The Original Series, series of the same name and became a worldwide Popular culture, pop-culture Cultural influence of ...
'', ''
The Lord of the Rings ''The Lord of the Rings'' is an Epic (genre), epic high fantasy novel written by English author and scholar J. R. R. Tolkien. Set in Middle-earth, the story began as a sequel to Tolkien's 1937 children's book ''The Hobbit'' but eventually d ...
'' ( Elvish), ''
Stargate SG-1 ''Stargate SG-1'' (often stylized in all caps, or abbreviated ''SG-1'') is a military science fiction Adventure fiction, adventure television series within Metro-Goldwyn-Mayer's Stargate, ''Stargate'' franchise. The show, created by Brad Wrig ...
'', '' Atlantis: The Lost Empire,
Ar Tonelico is a Media mix, multimedia project series made in collaboration by Gust Corporation and Banpresto (currently subsidiaries of Tecmo Koei and Namco Bandai Games respectively) consisting of video games, manga, and an OVA. The name of the series is al ...
'' ( Hymmnos), ''
Game of Thrones ''Game of Thrones'' is an American Fantasy television, fantasy Drama (film and television), drama television series created by David Benioff and for HBO. It is an adaptation of ''A Song of Ice and Fire'', a series of high fantasy novels by ...
'' ( Dothraki language and
Valyrian languages The Valyrian languages are a fictional language family in the ''A Song of Ice and Fire'' series of fantasy novels by George R. R. Martin, and in their television adaptation ''Game of Thrones'' and later ''House of the Dragon''. In the novels, Hi ...
), '' The Expanse'', ''
Avatar Avatar (, ; ) is a concept within Hinduism that in Sanskrit literally means . It signifies the material appearance or incarnation of a powerful deity, or spirit on Earth. The relative verb to "alight, to make one's appearance" is sometimes u ...
'', ''
Dune A dune is a landform composed of wind- or water-driven sand. It typically takes the form of a mound, ridge, or hill. An area with dunes is called a dune system or a dune complex. A large dune complex is called a dune field, while broad, flat ...
,'' and the ''
Myst ''Myst'' is a 1993 adventure video game developed by Cyan and published by Broderbund for Mac OS. In the game, the player travels via a special book to a mysterious island called Myst. The player interacts with objects and traverses the ...
'' series of computer adventure games.


Ownership of constructed languages

The matter of whether or not a constructed language can be owned or protected by intellectual property laws, or if it would even be possible to enforce those laws, is contentious. In a 2015 lawsuit, CBS and
Paramount Pictures Paramount Pictures Corporation, commonly known as Paramount Pictures or simply Paramount, is an American film production company, production and Distribution (marketing), distribution company and the flagship namesake subsidiary of Paramount ...
challenged a fan film project called Axanar, stating the project infringed upon their intellectual property, which included the
Klingon language The Klingon language (, ''Klingon scripts, '': , ) is the constructed language spoken by a fictional alien race called the Klingons in the ''Star Trek'' universe. Described in the 1985 book ''The Klingon Dictionary'' by Marc Okrand and delibe ...
, among other creative elements. During the controversy, Marc Okrand, the language's original designer expressed doubt as to whether Paramount's claims of ownership were valid. David J. Peterson, who created multiple well-known constructed languages including the
Valyrian languages The Valyrian languages are a fictional language family in the ''A Song of Ice and Fire'' series of fantasy novels by George R. R. Martin, and in their television adaptation ''Game of Thrones'' and later ''House of the Dragon''. In the novels, Hi ...
and Dothraki, advocated a similar opinion, saying that "Theoretically, anyone can publish anything using any language I created, and, in my opinion, neither I nor anyone else should be able to do anything about it."Owen, Beck
Can you copyright a fictional language?
''Copyright Licensing Agency'', 26 September 2019
However, Peterson also expressed concern that the respective rights-holders—regardless of whether or not their ownership of the rights is legitimate—would be likely to sue individuals who publish material in said languages, especially if the author might profit from said material. Furthermore, comprehensive learning material for such constructed languages as High Valyrian and Klingon has been published and made freely accessible on the language-learning platform
Duolingo Duolingo, Inc. is an American educational technology company that produces learning Mobile app, apps and provides Language assessment, language certification. Duolingo offers courses on 43 languages, ranging from English language, English, Fre ...
—but those courses are licensed by the respective copyright holders. Because only a few such disputes have occurred thus far, the legal consensus on ownership of languages remains uncertain. The
Tasmanian Aboriginal Centre The Tasmanian Aboriginal Centre (TAC) is a human-rights and cultural organisation for Aboriginal Tasmanians. It was originally founded as the Tasmanian Information Centre in 1973 and has campaigned on land return, Aboriginal identity and return of ...
claims ownership of
palawa kani Palawa kani is a constructed language created by the Tasmanian Aboriginal Centre as a composite Tasmanian languages, Tasmanian language, based on reconstructed vocabulary from the limited accounts of the various languages once spoken by the Abo ...
, an attempted composite reconstruction of up to a dozen extinct Tasmanian indigenous languages, and has asked Wikipedia to remove its article on the project. However, there is no current legal backing for the claim.


Modern conlang organizations

Various papers on constructed languages were published from the 1970s through the 1990s, such as ''Glossopoeic Quarterly'', ''Taboo Jadoo'', and ''The Journal of Planned Languages''."How did you find out that there were other conlangers?"
Conlang list posting by And Rosta, 14 October 2007
The Conlang Mailing List was founded in 1991, and later split off an AUXLANG mailing list dedicated to international auxiliary languages. In the early to mid-1990s a few conlang-related zines were published as email or websites, such as ''Vortpunoj''
at Steve Brewer's website
and ''Model Languages''. The Conlang mailing list has developed a community of conlangers with its own customs, such as translation challenges and translation relays, and its own terminology. Sarah Higley reports from results of her surveys that the demographics of the Conlang list are primarily men from North America and western Europe, with a smaller number from Oceania, Asia, the Middle East, and South America, with an age range from thirteen to over sixty; the number of women participating has increased over time. Later online communities include the Zompist Bulletin Board (ZBB; since 2001) and the Conlanger Bulletin Board. Discussion on these forums includes presentation of members' conlangs and feedback from other members, discussion of natural languages, whether particular conlang features have natural language precedents, and how interesting features of natural languages can be repurposed for conlangs, posting of interesting short texts as translation challenges, and meta-discussion about the philosophy of conlanging, conlangers' purposes, and whether conlanging is an art or a hobby. Another 2001 survey by Patrick Jarrett showed an average age of 30.65, with the average time since starting to invent languages 11.83 years."Update mailing list statistics—FINAL"
Conlang list posting by Patrick Jarrett, 13 September 2001
A more recent thread on the ZBB showed that many conlangers spend a relatively small amount of time on any one conlang, moving from one project to another; about a third spend years on developing the same language."Average life of a conlang"
thread on Zompist Bulletin Board, 15 August 2008; accessed 26 August 2008.

thread on Conlang mailing list, 27 August 2008 (should be archived more persistently than the ZBB thread)


Conlang creation

Most modern conlangers create conlangs as a hobby, for a fictional work, or for personal fulfillment. Conlangers typically create languages by defining their conlang's
phonology Phonology (formerly also phonemics or phonematics: "phonemics ''n.'' 'obsolescent''1. Any procedure for identifying the phonemes of a language from a corpus of data. 2. (formerly also phonematics) A former synonym for phonology, often pre ...
,
syntax In linguistics, syntax ( ) is the study of how words and morphemes combine to form larger units such as phrases and sentences. Central concerns of syntax include word order, grammatical relations, hierarchical sentence structure (constituenc ...
,
grammar In linguistics, grammar is the set of rules for how a natural language is structured, as demonstrated by its speakers or writers. Grammar rules may concern the use of clauses, phrases, and words. The term may also refer to the study of such rul ...
, and other properties. Doing so requires at least a rudimentary understanding of
linguistics Linguistics is the scientific study of language. The areas of linguistic analysis are syntax (rules governing the structure of sentences), semantics (meaning), Morphology (linguistics), morphology (structure of words), phonetics (speech sounds ...
.


See also

* List of constructed languages *
Interlinguistics Interlinguistics, also known as cosmoglottics, is the science of planned languages that has existed for more than a century. Formalised by Otto Jespersen in 1931 as the science of interlanguages, in more recent times, the field has been more fo ...
*Aboriginal constructed languages:
Damin Damin ( in the practical orthography of Lardil) was a ceremonial language register used by the advanced initiated men of the aboriginal Lardil ( in the practical orthography) and Yangkaal peoples of northern Australia. Both inhabit island ...
, Eskayan *
Idioglossia An idioglossia (from the Ancient Greek , 'own, personal, distinct' and , 'tongue') is an idiosyncrasy, idiosyncratic language invented and spoken by only one or two people. Most often, ''idioglossia'' refers to the "private languages" of young c ...
*
Idiolect Idiolect is an individual's unique use of language, including speech. This unique usage encompasses vocabulary, grammar, and pronunciation. This differs from a dialect, a common set of linguistic characteristics shared among a group of people. Th ...
*
Cant (language) A cant is the jargon or language of a group, often employed to exclude or mislead people outside the group.McArthur, T. (ed.) ''The Oxford Companion to the English Language'' (1992) Oxford University Press It may also be called a cryptolect, argo ...
* ISO, SIL, and BCP language codes for constructed languages *Language construction ** Artificial script ** Langmaker ** Language Construction Kit **
Language game A language game (also called a cant, secret language, ludling, or argot) is a system of manipulating spoken words to render them incomprehensible to an untrained listener. Language games are used primarily by groups attempting to conceal their ...
**
Language regulator This is a list of bodies that consider themselves to be authorities on standard languages, often called language academies. Language academies are motivated by, or closely associated with, linguistic purism and Prestige (sociolinguistics), presti ...
** List of language inventors *Language modelling and translation **
Knowledge representation Knowledge representation (KR) aims to model information in a structured manner to formally represent it as knowledge in knowledge-based systems whereas knowledge representation and reasoning (KRR, KR&R, or KR²) also aims to understand, reason, and ...
** Language translation **
Metalanguage In logic and linguistics, a metalanguage is a language used to describe another language, often called the ''object language''. Expressions in a metalanguage are often distinguished from those in the object language by the use of italics, quota ...
** Universal grammar * Mystical languages ** Glossolalia **
Language of the birds In Abrahamic and European mythology, medieval literature and occultism, the language of the birds is postulated as a mystical, perfect divine language, Adamic language, Enochian, angelic language or a mythical or magical language used by ...
*Spontaneous emergence of grammar **
Artificial language Artificial languages are languages of a typically very limited size which emerge either in computer simulations between artificial agents, robot interactions or controlled psychological experiments with humans. They are different from both constr ...
** June and Jennifer Gibbons ** Nicaraguan Sign Language **
Origin of language The origin of language, its relationship with human evolution, and its consequences have been subjects of study for centuries. Scholars wishing to study the origins of language draw inferences from evidence such as the fossil record, archaeolog ...
**
Pidgin A pidgin , or pidgin language, is a grammatically simplified form of contact language that develops between two or more groups of people that do not have a language in common: typically, its vocabulary and grammar are limited and often drawn f ...
** Poto and Cabengo * Linguistic determinism *
Linguistic relativity Linguistic relativity asserts that language influences worldview or cognition. One form of linguistic relativity, linguistic determinism, regards peoples' languages as determining and influencing the scope of cultural perceptions of their surro ...
* Pasigraphy *
Universal language Universal language may refer to a hypothetical or historical language spoken and understood by all or most of the world's people. In some contexts, it refers to a means of communication said to be understood by all humans. It may be the idea o ...
*'' In the Land of Invented Languages''


Notes


References

* * *Couturat, Louis (1907). ''Les nouvelles langues internationales''. Paris: Hachette. With Léopold Leau. Republished 2001, Olms. *Couturat, Louis (1910). ''Étude sur la dérivation dans la langue internationales''. Paris: Delagrave. 100 p. * * *
"Babel's modern architects"
by Amber Dance. ''The Los Angeles Times'', 24 August 2007 (Originally published as "In their own words -- literally")


External links


Language Creation Society
a nonprofit dedicated to all forms of language creation.
Conlang Atlas of Language Structures
, a typological database of conlangs, based on the World Atlas of Language Structures.
Blueprints For Babel
focusing on international auxiliary languages. {{DEFAULTSORT:Constructed Language Interlinguistics Language Linguistics