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Ido () is a constructed language derived from Reformed Esperanto, and similarly designed with the goal of being a universal second language for people of diverse backgrounds. To function as an effective ''international auxiliary language'', Ido was specifically designed to be grammatically,
orthographically An orthography is a set of convention (norm), conventions for writing a language, including norms of spelling, hyphenation, capitalization, word, word breaks, Emphasis (typography), emphasis, and punctuation. Most transnational languages in the ...
, and lexicographically regular (and, above all, easy to learn and use). It is the most successful of the many
Esperanto Esperanto ( or ) is the world's most widely spoken constructed international auxiliary language. Created by the Warsaw-based ophthalmologist L. L. Zamenhof in 1887, it was intended to be a universal second language for international communi ...
derivatives, called '' Esperantidoj''. Ido was created in 1907 out of a desire to reform perceived flaws in Esperanto, a language that had been created 20 years earlier to facilitate international communication. The name of the language traces its origin to the Esperanto word ', meaning "offspring", since the language is a "descendant" of Esperanto. After its inception, Ido gained support from some in the Esperanto community. A setback occurred with the sudden death in 1914 of one of its most influential proponents, Louis Couturat. In 1928, leader Otto Jespersen left the movement for his own language Novial. There were two reasons for why Ido declined in popularity: first, the emergence of further schisms arising from competing reform projects; and second, a general lack of awareness of Ido as a candidate for an international language. These obstacles weakened the movement and it was not until the rise of the Internet that it began to regain momentum. Ido uses the same 26 letters as the English (Latin) alphabet, with no
diacritic A diacritic (also diacritical mark, diacritical point, diacritical sign, or accent) is a glyph added to a letter or to a basic glyph. The term derives from the Ancient Greek (, "distinguishing"), from (, "to distinguish"). The word ''diacriti ...
s. It draws its vocabulary from English, French, German, Italian, Latin, Russian, Spanish and Portuguese, and is largely intelligible to those who have studied Esperanto. Several works of literature have been translated into Ido, including '' The Little Prince'', the Book of Psalms, and the Gospel of Luke. As of the year 2000, there were approximately 100–200 Ido speakers in the world, though more recent estimates place the number of speakers closer to 1,000–5,000.Blanke (2000), cited in Sabine Fiedle
"Phraseology in planned languages"
''Phraseology / Phraseologie,'' Walter de Gruyter 2007. pp. 779.
In 2020, Ido had 24 native speakers in Finland.


History

The idea of a universal second language is not new, and constructed languages are not a recent phenomenon. The first known constructed language was Hildegard of Bingen's Lingua Ignota, created in the 12th century. The concept did not attract significant interest until the language Volapük was created in 1879. Volapük was popular for some time and apparently had a few thousand users, but was later eclipsed by the popularity of
Esperanto Esperanto ( or ) is the world's most widely spoken constructed international auxiliary language. Created by the Warsaw-based ophthalmologist L. L. Zamenhof in 1887, it was intended to be a universal second language for international communi ...
, which arose in 1887. Several other languages, such as Latino sine Flexione and
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 as ...
were also put forward. It was during this time that French mathematician Louis Couturat formed the '' Delegation for the Adoption of an International Auxiliary Language''. This delegation made a formal request to the International Association of Academies in Vienna to select and endorse an international language; the request was rejected in May 1907. The Delegation then met as a Committee in Paris in October 1907 to discuss the adoption of a standard international language. Among the languages considered was a new language anonymously submitted at the last moment (and therefore against the Committee rules) under the pen name ''Ido''. In the end the committee, always without plenary sessions and consisting of only 12 members, concluded the last day with 4 votes for and 1 abstention. They concluded that no language was completely acceptable, but that Esperanto could be accepted "on condition of several modifications to be realized by the permanent Commission in the direction defined by the conclusions of the Report of the Secretaries ouis Couturat and Léopold Leau">Léopold_Leau.html" ;"title="ouis Couturat and Léopold Leau">ouis Couturat and Léopold Leauand by the Ido project". Esperanto's inventor, L. L. Zamenhof, having heard a number of complaints, had suggested in 1894 a proposal for a Reformed Esperanto with several changes that Ido adopted and made it closer to French: eliminating the accented letters and the
accusative case The accusative case (abbreviated ) of a noun is the grammatical case used to mark the direct object of a transitive verb. In the English language, the only words that occur in the accusative case are pronouns: 'me,' 'him,' 'her,' 'us,' and ‘the ...
, changing the plural to an Italianesque ''-i'', and replacing the table of correlatives with more Latinate words. However, the Esperanto community voted and rejected Reformed Esperanto, and likewise most rejected the recommendations of the 1907 Committee composed by 12 members. Zamenhof deferred to their judgment, although doubtful. Furthermore, controversy ensued when the "Ido project" was found to have been primarily devised by Louis de Beaufront, whom Zamenhof had chosen to represent Esperanto before the committee, as the committee's rules dictated that the creator of a submitted language could not defend it. The committee's language was French and not everyone could speak in French. When the president of the Committee asked who was the author of Ido's project, Couturat, Beaufront and Leau answered that they were not. Beaufront was the person who presented Ido's project and gave a description as a better, richer version of Esperanto. Couturat, Leau, Beaufront and Jespersen were finally the only members who voted, all of them for Ido's project. A month later, Couturat accidentally put Jespersen in a copy of a letter in which he acknowledged that Beaufront was the author of the Ido project. Jespersen was angered by this and asked for a public confession, which was never forthcoming. It is estimated that some 20% of Esperanto leaders and 3–4% of ordinary Esperantists switched to Ido, which from then on suffered constant modifications seeking to perfect it, but which ultimately had the effect of causing many Ido speakers to give up on trying to learn it. Although it fractured the Esperanto movement, the schism gave the remaining Esperantists the freedom to concentrate on using and promoting their language as it stood. At the same time, it gave the Idists freedom to continue working on their own language for several more years before actively promoting it. The ''Uniono di la Amiki di la Linguo Internaciona'' (''Union of Friends of the International Language'') was established along with an Ido Academy to work out the details of the new language. Couturat, who was the leading proponent of Ido, was killed in an automobile accident in 1914. This, along with World War I, practically suspended the activities of the Ido Academy from 1914 to 1920. In 1928 Ido's major intellectual supporter, the Danish linguist Otto Jespersen, published his own planned language, Novial. His leaving the Ido movement set it back even further.


Digital era

The language still has active speakers, numbering about 500. The Internet has sparked a renewal of interest in the language in recent years. A sample of 24 Idists on the Yahoo! group ''Idolisto'' during November 2005 showed that 57% had begun their studies of the language during the preceding three years, 32% from the mid-1990s to 2002, and 8% had known the language from before.


Changes

Few changes have been made to Ido since 1922. Camiel de Cock was named secretary of linguistic issues in 1990, succeeding Roger Moureaux. He resigned after the creation of a linguistic committee in 1991. De Cock was succeeded by Robert C. Carnaghan, who held the position from 1992 to 2008. No new words were adopted between 2001 and 2006. Following the 2008–2011 elections of ULI's direction committee,
Gonçalo Neves Gonçalo is a Portuguese masculine given name and family name. People with the name include: *Gonçalo Brandão, a Portuguese footballer *Gonçalo Coelho, a Portuguese explorer of the South Atlantic and of the South American coast *Gonçalo Foro, ...
replaced Carnaghan as secretary of linguistic issues in February 2008. Neves resigned in August 2008. A new linguistic committee was formed in 2010. In April 2010, Tiberio Madonna was appointed as secretary of linguistic issues, succeeding Neves. In January 2011, ULI approved eight new words. This was the first addition of words in many years. As of January 2021, the secretary of linguistic issues remains Tiberio Madonna.


Phonology

Ido has five vowel phonemes. The values and are interchangeable depending on speaker preference, as are and . The orthographic sequences and indicate
diphthong A diphthong ( ; , ), also known as a gliding vowel, is a combination of two adjacent vowel sounds within the same syllable. Technically, a diphthong is a vowel with two different targets: that is, the tongue (and/or other parts of the speech o ...
s in word roots but not when created by affixing. All polysyllabic words are stressed on the second-to-last syllable except for verb infinitives, which are stressed on the last syllableskolo, kafeo and lernas for "school", "coffee" and the present tense of "to learn", but irar, savar and drinkar for "to go", "to know" and "to drink". If an i or u precedes another vowel, the pair is considered part of the same syllable when applying the accent rulethus radio, familio and manuo for "radio", "family" and "hand", unless the two vowels are the only ones in the word, in which case the "i" or "u" is stressed: dio, frua for "day" and "early".


Orthography

Ido uses the same 26 letters as the English alphabet and ISO Basic Latin alphabet with three digraphs and no
ligatures Ligature may refer to: * Ligature (medicine), a piece of suture used to shut off a blood vessel or other anatomical structure ** Ligature (orthodontic), used in dentistry * Ligature (music), an element of musical notation used especially in the me ...
or diacritics. Where the table below lists two pronunciations, either is perfectly acceptable. The digraphs are:


Grammar

The definite article is "''la''" and is invariable. The indefinite article (a/an) does not exist in Ido. Each word in the Ido vocabulary is built from a root word. A word consists of a root and a grammatical ending. Other words can be formed from that word by removing the grammatical ending and adding a new one, or by inserting certain
affix In linguistics, an affix is a morpheme that is attached to a word stem to form a new word or word form. Affixes may be derivational, like English ''-ness'' and ''pre-'', or inflectional, like English plural ''-s'' and past tense ''-ed''. They ar ...
es between the root and the grammatical ending. Some of the grammatical endings are defined as follows: These are the same as in Esperanto except for ''-i'', ''-ir'', ''-ar'', ''-or'' and ''-ez''. Esperanto marks noun plurals by an ''agglutinative'' ending ''-j'' (so plural nouns end in ''-oj''), uses ''-i'' for verb infinitives (Esperanto infinitives are tenseless), and uses ''-u'' for the imperative. Verbs in Ido, as in Esperanto, do not conjugate depending on person, number or gender; the -as, -is, and -os endings suffice whether the subject is I, you, he, she, they, or anything else. For the word "to be," Ido allows either "''esas''" or "''es''" in the present tense; however, the full forms must be used for the past tense "''esis''" and future tense "''esos''." Adjectives and adverbs are compared in Ido by means of the words ''plu'' = more, ''maxim'' = most, ''min'' = less, ''minim'' = least, ''kam'' = than/as. There exist in Ido three categories of adverbs: the simple, the derived, and the composed. The simple adverbs do not need special endings, for example: ''tre'' = very, ''tro'' = too, ''olim'' = formerly, ''nun'' = now, ''nur'' = only. The derived and composed adverbs, not being originally adverbs but derived from nouns, adjectives and verbs, have the ending -e.


Syntax

Ido word order is generally the same as English ( subject–verb–object), so the sentence ''Me havas la blua libro'' is the same as the English "I have the blue book", both in meaning and word order. There are a few differences, however: * Adjectives can precede the noun as in English, or follow the noun as in Spanish. Thus, ''Me havas la libro blua'' means the same thing. * Ido has the accusative suffix ''-n''. Unlike Esperanto, this suffix is only required when the object of the sentence is not clear, for example, when the subject-verb-object word order is not followed. Thus, ''La blua libron me havas'' also means the same thing. Ido generally does not impose rules of grammatical
agreement Agreement may refer to: Agreements between people and organizations * Gentlemen's agreement, not enforceable by law * Trade agreement, between countries * Consensus, a decision-making process * Contract, enforceable in a court of law ** Meeting o ...
between grammatical categories within a sentence. For example, the verb in a sentence is invariable regardless of the number and person of the subject. Nor must the adjectives be pluralized as well the nounsin Ido ''the large books'' would be ''la granda libri'' as opposed to the French ''les grands livres'' or the Esperanto ''la grandaj libroj''. Negation occurs in Ido by simply adding ne before a verb: Me ne havas libro means "I do not have a book". This as well does not vary, and thus the "I do not", "He does not", "They do not" before a verb are simply Me ne, Il ne, and Li ne. In the same way, past tense and future tense negatives are formed by ne before the conjugated verb. "I will not go" and "I did not go" become Me ne iros and Me ne iris respectively. Yes/no questions are formed by the particle ka in front of the question. "I have a book" (me havas libro) becomes Ka me havas libro? (do I have a book?). Ka can also be placed in front of a noun without a verb to make a simple question, corresponding to the English "is it?" Ka Mark? can mean, "Are you Mark?", "Is it Mark?", "Do you mean Mark?" depending on the context.


Pronouns

The pronouns of Ido were revised to make them more acoustically distinct than those of Esperanto, which all end in ''i''. Especially the singular and plural first-person pronouns ''mi'' and ''ni'' may be difficult to distinguish in a noisy environment, so Ido has ''me'' and ''ni'' instead. Ido also distinguishes between intimate (''tu'') and formal (''vu'') second-person singular pronouns as well as plural second-person pronouns (''vi'') not marked for intimacy. Furthermore, Ido has a pan-gender third-person pronoun ''lu'' (it can mean "he", "she", or "it", depending on the context) in addition to its masculine (''il''), feminine (''el''), and neuter (''ol'') third-person pronouns. # ''ci'', although technically the familiar form of the word "you" in Esperanto, is seldom used. Esperanto's inventor himself did not include the pronoun in the first book on Esperanto and only later reluctantly; later he recommended against using ''ci'' because different cultures have conflicting traditions regarding the use of the familiar and formal forms of "you". #''ri'', ''iŝi'', ''iĝi'' and by extension ''iri'' are proposed neologisms and are rare, but they are still used albeit seldom. ''ol'', like English ''it'' and Esperanto ''ĝi'', is not limited to inanimate objects, but can be used "for entities whose sex is indeterminate: ''babies, children, humans, youths, elders, people, individuals, horses,
attle Debris (, ) is rubble, wreckage, ruins, litter and discarded garbage/refuse/trash, scattered remains of something destroyed, or, as in geology, large rock fragments left by a melting glacier, etc. Depending on context, ''debris'' can refer to ...
cats,'' etc." ''Lu'' is often mistakenly labeled an epicene pronoun, that is, one that refers to both masculine and feminine beings, but in fact, ''lu'' is more properly a "pan-gender" pronoun, as it is also used for referring to inanimate objects. From ''Kompleta Gramatiko Detaloza di la Linguo Internaciona Ido'' by Beaufront:


Table of correlatives

Ido makes correlatives by combining entire words together and changing the word ending, with some irregularities to show distinction. # The initial ''i'' can be omitted: ''ta'', ''to'', ''ti'', ''ta''. # One can omit the initial ''a'': ''ultempe'', ''nultempe'', ''ulspeca'', ''nulspeca'', ''ulmaniere'', ''nulmaniere''. # ''omnatempe'' is correct and usable, but ''sempre'' is the actual word. # Instead of ''irga quanto'', ''nula quanto'' and ''la tota quanto'' one usually says ''irgo'', ''nulo'' and ''omno''.


Compound formation

Composition in Ido obeys stricter rules than in Esperanto, especially formation of nouns, adjectives and verbs from a radical of a different class. The reversibility principle assumes that for each composition rule (affix addition), the corresponding decomposition rule (affix removal) is valid. Hence, while in Esperanto an adjective (for instance , formed on the noun radical , can mean an attribute ( "paper-made encyclopedia") and a relation ( "paper-making factory"), Ido will distinguish the attribute ("paper" or "of paper" (not "paper-made" exactly)) from the relation ("paper-making"). Similarly, means in both Esperanto and Ido the noun "crown"; where Esperanto allows formation of "to crown" by simply changing the ending from noun to verb ("crowning" is ), Ido requires an affix so the composition is reversible: ("the act of crowning" is ). According to Claude Piron, some modifications brought by Ido are in practice impossible to use and ruin spontaneous expression:
Ido displays, on linguistic level, other drawbacks Esperanto succeeded to avoid, but I don't have at hand documents which would allow me to go further in detail. For instance, if I remember correctly, where Esperanto only has the suffix *, Ido has several: **, **, **, which match subtleties which were meant to make language clearer, but that, in practice, inhibit natural expression.


Vocabulary

Vocabulary in Ido is derived from French, Italian, Spanish, English, German, and Russian. Basing the vocabulary on various widespread languages was intended to make Ido as easy as possible for the greatest number of people possible. Early on, the first 5,371 Ido word roots were analyzed compared to the vocabulary of the six source languages, and the following result was found: * 2024 roots (38%) belong to 6 languages * 942 roots (17%) belong to 5 languages * 1111 roots (21%) belong to 4 languages * 585 roots (11%) belong to 3 languages * 454 roots (8%) belong to 2 languages * 255 roots (5%) belong to 1 language Another analysis showed that: * 4880 roots (91%) are found in French * 4454 roots (83%) are found in Italian * 4237 roots (79%) are found in Spanish * 4219 roots (79%) are found in English * 3302 roots (61%) are found in German * 2821 roots (52%) are found in Russian Vocabulary in Ido is often created through a number of official prefixes and suffixes that alter the meaning of the word. This allows a user to take existing words and modify them to create neologisms when necessary, and allows for a wide range of expression without the need to learn new vocabulary each time. Though their number is too large to be included in one article, some examples include: *The diminutive suffix -et-. Domo (house) becomes dometo (cottage), and libro (book) becomes libreto (novelette or short story). *The pejorative suffix -ach-. Domo becomes domacho (hovel), and libro becomes libracho (a shoddy piece of work, pulp fiction, etc.) *The prefix retro-, which implies a reversal. Irar (to go) becomes retroirar (to go back, backward) and venar (to come) becomes retrovenar (to return). New vocabulary is generally created through an analysis of the word, its etymology, and reference to the six source languages. If a word can be created through vocabulary already existing in the language then it will usually be adopted without need for a new radical (such as wikipedio for ''Wikipedia'', which consists of wiki + enciklopedio for ''encyclopedia''), and if not an entirely new word will be created. The word alternatoro for example was adopted in 1926, likely because five of the six source languages used largely the same orthography for the word, and because it was long enough to avoid being mistaken for other words in the existing vocabulary. Adoption of a word is done through consensus, after which the word will be made official by the union. Care must also be taken to avoid homonyms if possible, and usually a new word undergoes some discussion before being adopted. Foreign words that have a restricted sense and are not likely to be used in everyday life (such as the word '' intifada'' to refer to
the conflict ''The Conflict'' is a 1916 American silent drama film directed by Ralph Ince and starring Lucille Lee Stewart, Huntley Gordon and Wilfred Lytell.Connelly p.51 Cast * Lucille Lee Stewart as Madeleine Turner * Jessie Miller as Jeanette Harcour ...
between Israel and
Palestine __NOTOC__ Palestine may refer to: * State of Palestine, a state in Western Asia * Palestine (region), a geographic region in Western Asia * Palestinian territories, territories occupied by Israel since 1967, namely the West Bank (including East ...
) are left untouched, and often written in italics. Ido, unlike Esperanto, does not assume the male sex by default. For example, Ido does not derive the word for "waitress" by adding a feminine suffix to "waiter", as Esperanto does. Instead, Ido words are defined as sex-neutral, and two different suffixes derive masculine and feminine words from the root: ' for a waiter of either sex, ' for a male waiter, and ' for a waitress. There are only two exceptions to this rule: First, ' for "father", ' for "mother", and ' for "parent", and second, ' for "man", ' for "woman", and ' for "adult".


Sample

The Lord's Prayer The Lord's Prayer, also called the Our Father or Pater Noster, is a central Christian prayer which Jesus taught as the way to pray. Two versions of this prayer are recorded in the gospels: a longer form within the Sermon on the Mount in the Gosp ...
:


Literature and publications

Ido has a number of publications that can be subscribed to or downloaded for free in most cases. is a magazine produced in France every few months with a range of topics. is a magazine produced by the Spanish Ido Society every two months that has a range of topics, as well as a few dozen pages of work translated from other languages. is the official organ of the Ido movement and has been around since the inception of the movement in 1908. Other sites can be found with various stories, fables or proverbs along with a few books of the Bible translated into Ido on a smaller scale. The site has a few podcasts in Ido along with various songs and other recorded material. Wikipedia includes a
Ido-language edition
(known in Ido as ); in January 2012 it was the 81st most visited Wikipedia.


Symbols of Ido

The Ido star or Jankó star is the main symbol of Ido. It is a six pointed star, with the points representing Ido's six source languages: English, French, Italian, German, Spanish and Russian. Alternatively, the six points represent the six continents (excluding Antarctica). The emblem was originally a six pointed white star on a circular blue background, consisting of two concentric, equilateral triangles, with one vertically flipped. However, this was soon changed due to the similarity it presented with the
Star of David The Star of David (). is a generally recognized symbol of both Jewish identity and Judaism. Its shape is that of a hexagram: the compound of two equilateral triangles. A derivation of the ''seal of Solomon'', which was used for decorative ...
, since a true
international auxiliary language An international auxiliary language (sometimes acronymized as IAL or contracted as auxlang) is a language meant for communication between people from all different nations, who do not share a common first language. An auxiliary language is primaril ...
should not have religious affiliations. After a search to find an appropriate new symbol, the Ido-Akademio decided on the current Ido symbol, created by their secretary,
Paul von Jankó Paul von Jankó (2 June 1856 – 17 March 1919) was a Hungary, Hungarian pianist, engineer and Idist. He first studied mathematics and music in Vienna, where he was a pupil of H. Schmitt, J. Krenn and Anton Bruckner. He then moved to Berlin where ...
(hence the alternative name the Jankó star). The current Ido Star is a concave
isotoxal In geometry, a polytope (for example, a polygon or a polyhedron) or a tiling is isotoxal () or edge-transitive if its symmetries act transitively on its edges. Informally, this means that there is only one type of edge to the object: given two ...
hexagon, with a vertically flipped equilateral triangle overlaid on top. This new shape also had the benefit of being able to be copyrighted.


International Ido conventions

ULI Uli may refer to: *Uli, Iran, a village *Uli, Anambra, a town in Nigeria *Uli I of Mali *Uli (design), by the Igbo people of Nigeria *Uli figure, from New Ireland, Papua New Guinea *Uli (food), a rice-based food * ISO 639 code for the Ulithian lang ...
organises Ido conventions yearly, and the conventions include a mix of tourism and work. * 2019: Berlin, Germany, 15 participants from 2 countries
Information
* 2018: Provins, France, 11 participants from 5 countries
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* 2017: České Budějovice, Czech Republic, 8 participants from 5 countries
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* 2016: Valencia, Spain, 10 participants from 7 countries
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* 2015: Berlin, Germany, 14 participants
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* 2014: Paris, France
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* 2013:
Ouroux-en-Morvan Ouroux-en-Morvan is a commune in the Nièvre department in the Bourgogne-Franche-Comté region in central France. In 2018, it had a population of 601. Geography Ouroux-en-Morvan, which covers an area of 60.56 km2 (23.38 sq mi), is part of Morvan ...
, France, 13 participants from 4 countries
Information
* 2012:
Dessau Dessau is a town and former municipality in Germany at the confluence of the rivers Mulde and Elbe, in the '' Bundesland'' (Federal State) of Saxony-Anhalt. Since 1 July 2007, it has been part of the newly created municipality of Dessau-Roßlau ...
, Germany, 12 participants
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* 2011: Echternach, Luxembourg
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, 24 participants from 11 countries * 2010: Tübingen, Germany
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* 2009:
Riga Riga (; lv, Rīga , liv, Rīgõ) is the capital and largest city of Latvia and is home to 605,802 inhabitants which is a third of Latvia's population. The city lies on the Gulf of Riga at the mouth of the Daugava river where it meets the Ba ...
,
Latvia Latvia ( or ; lv, Latvija ; ltg, Latveja; liv, Leţmō), officially the Republic of Latvia ( lv, Latvijas Republika, links=no, ltg, Latvejas Republika, links=no, liv, Leţmō Vabāmō, links=no), is a country in the Baltic region of ...
, and Tallinn, Estonia, 14 participants from 7 countries
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* 2008: Wuppertal- Neviges, Germany, 18 participants from 5 countries
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* 2007: Paris, France, 14 participants from 9 countries
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Photos
* 2006: Berlin, Germany, approx. 25 participants from 10 countries
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* 2005: Toulouse, France, 13 participants from 4 countries
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* 2004: Kyiv, Ukraine, 17 participants from 9 countries
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* 2003:
Großbothen Großbothen is a village and a former municipality in the Leipzig district in Saxony, Germany. Großbothen had an area of 33.45 km² and a population of 3,453 (as of December 31, 2009). At a local government reform on 1 January 2011, the muni ...
, Germany, participants from 6 countries
Information
* 2002: Kraków, Poland, 14 participants from 6 countries
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* 2001: Nuremberg, Germany, 14 participants from 5 countries

* 2000: Nuremberg, Germany * 1999: Waldkappel, Germany * 1998:
Białobrzegi Białobrzegi is a town in Poland, in Masovian Voivodeship, about south of Warsaw. It is the capital of the Białobrzegi County and Gmina Białobrzegi (commune). The town is located on the border of the ''Białobrzegi Valley'' and ''Radom Plai ...
, Poland, 15 participants from 6 countries * 1997:
Bakkum Bakkum is a village in the Dutch province of North Holland. It is a part of the municipality of Castricum and lies about 12 km southwest of Alkmaar. It has three satellites: the village of , the hamlet and Bakkum aan Zee which is nowadays c ...
, Netherlands, 19 participants from 7 countries * 1995:
Elsnigk Elsnigk is a village and a former municipality in the district of Anhalt-Bitterfeld, in Saxony-Anhalt, Germany. Since 1 January 2010, it is part of the municipality Osternienburger Land. Former municipalities in Saxony-Anhalt Osternienburger ...
, Germany * 1991: Ostend, Belgium, 21 participants * 1990:
Waldkappel Waldkappel is a small town in the Werra-Meißner-Kreis district in northern Hesse, Germany. Geography Location Waldkappel is located between Hessisch Lichtenau in the west and Eschwege in the east in the North Hesse Upland between the Meißner-Ka ...
, Germany * 1989: Zürich- Thalwil, Switzerland * 1987: Eschwege, Germany * 1985:
Antwerp Antwerp (; nl, Antwerpen ; french: Anvers ; es, Amberes) is the largest city in Belgium by area at and the capital of Antwerp Province in the Flemish Region. With a population of 520,504,
, Belgium * 1983: York, England * 1981:
Jongny Jongny () is a municipality in the district of Riviera-Pays-d'Enhaut in the canton of Vaud in Switzerland. History Jongny is first mentioned around 1168-80 as ''Iaunie''. Geography Jongny has an area, , of . Of this area, or 49.1% is used fo ...
, Switzerland * 1980:
Namur Namur (; ; nl, Namen ; wa, Nameur) is a city and municipality in Wallonia, Belgium. It is both the capital of the province of Namur and of Wallonia, hosting the Parliament of Wallonia, the Government of Wallonia and its administration. Namu ...
, Belgium, 35 participants * 1979: Uppsala, Sweden * 1978: Cambridge, England * 1977:
Berlin-Tegel Berlin Tegel "Otto Lilienthal" Airport (german: link=no, Flughafen Berlin-Tegel „Otto Lilienthal“) was the primary international airport of Berlin, the federal capital of Germany. The airport was named after aviation pioneer Otto Lilienth ...
, Germany * 1976:
Saint-Nazaire Saint-Nazaire (; ; Gallo: ''Saint-Nazère/Saint-Nazaer'') is a commune in the Loire-Atlantique department in western France, in traditional Brittany. The town has a major harbour on the right bank of the Loire estuary, near the Atlantic Ocean ...
, France * 1975: Thun, Switzerland * 1974: Kyiv, Ukraine * 1973: Cardiff, Wales * 1972:
Chaux-de-Fonds La Chaux-de-Fonds () is a Swiss city in the canton of Neuchâtel. It is located in the Jura mountains at an altitude of 1000 m, a few kilometers south of the French border. After Geneva, Lausanne and Fribourg, it is the fourth largest city l ...
, Switzerland * 1971: Trollhättan,
Sweden Sweden, formally the Kingdom of Sweden,The United Nations Group of Experts on Geographical Names states that the country's formal name is the Kingdom of SwedenUNGEGN World Geographical Names, Sweden./ref> is a Nordic country located on ...
* 1970: Luxembourg City, Luxembourg * 1969: Zürich, Switzerland * 1968: Berlin, Germany * 1967:
Bourges Bourges () is a commune in central France on the river Yèvre. It is the capital of the department of Cher, and also was the capital city of the former province of Berry. History The name of the commune derives either from the Bituriges, t ...
, France * 1966: Biella, Italy * 1965:
Lons-le-Saunier Lons-le-Saunier () is a Communes of France, commune and capital of the Jura (department), Jura Department, eastern France. Geography The town is in the heart of the Revermont region, at the foot of the first plateau of the Jura massif. The Jur ...
, France * 1964: Kiel, Germany * 1963: Barcelona, Spain * 1962: Thun, Switzerland * 1961: Zürich, Switzerland, participants * 1960: Colmar, France * 1959:
Freiburg im Breisgau Freiburg im Breisgau (; abbreviated as Freiburg i. Br. or Freiburg i. B.; Low Alemannic German, Low Alemannic: ''Friburg im Brisgau''), commonly referred to as Freiburg, is an independent city in Baden-Württemberg, Germany. With a population o ...
, Germany * 1957: Luxembourg City, Luxembourg * 1952: Berlin, Germany * 1951: Turin, Italy * 1950:
Colmar Colmar (, ; Alsatian: ' ; German during 1871–1918 and 1940–1945: ') is a city and commune in the Haut-Rhin department and Grand Est region of north-eastern France. The third-largest commune in Alsace (after Strasbourg and Mulhouse), it is ...
, France * 1939: St. Gallen, Switzerland * 1937: Paris, France * 1936: Szombathely, Hungary * 1935: Fredericia, Denmark * 1934: Oostduinkerke, Belgium * 1933:
Mondorf Mondorf-les-Bains ( ; ) is a commune and town in south-eastern Luxembourg. It is part of the canton of Remich. Mondorf-les-Bains is a spa town (hence its name), and has the only casino in Luxembourg. , the commune of Mondorf-les-Bains (other tow ...
, Luxembourg * 1931: Lauenburg/Elbe, Germany * 1930: Sopron, Hungary * 1929:
Freiburg im Breisgau Freiburg im Breisgau (; abbreviated as Freiburg i. Br. or Freiburg i. B.; Low Alemannic German, Low Alemannic: ''Friburg im Brisgau''), commonly referred to as Freiburg, is an independent city in Baden-Württemberg, Germany. With a population o ...
, Germany * 1928: Zürich,
Switzerland ). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel ...
* 1927: Paris, France * 1926: Prague, Czechoslovakia * 1925: Turin, Italy * 1924: Luxembourg City, Luxembourg * 1923:
Kassel Kassel (; in Germany, spelled Cassel until 1926) is a city on the Fulda River in northern Hesse, Germany. It is the administrative seat of the Regierungsbezirk Kassel and the district of the same name and had 201,048 inhabitants in December 2020 ...
, Germany * 1922:
Dessau Dessau is a town and former municipality in Germany at the confluence of the rivers Mulde and Elbe, in the '' Bundesland'' (Federal State) of Saxony-Anhalt. Since 1 July 2007, it has been part of the newly created municipality of Dessau-Roßlau ...
, Germany * 1921: Vienna, Austria


See also

*
Comparison between Esperanto and Ido Esperanto and Ido are constructed international auxiliary languages, with Ido being an ''Esperantido'' derived from Esperanto and Reformed Esperanto. The number of speakers is estimated at 100 thousand to 2 million for Esperanto, whereas Ido ...
*
Comparison between Ido and Novial Novial was created as an international auxiliary language by Danish linguist Otto Jespersen, who introduced it to the world in 1928. Jespersen had previously been a co-author of Ido, which started to take form around 1907. Both languages base ...
*
Comparison between Ido and Interlingua Ido and Interlingua are two constructed languages created in the 20th century, Ido circa 1910 and Interlingua circa 1940. Both have had some measure of success, but Interlingua has enjoyed greater diffusion and acceptance by public and private ...
*
Interhelpo Interhelpo (''international laboristal helpo'') was an industrial cooperative of workers and farmers (Esperantists and Idists) between 1923 and 1943, established for the special purpose of helping to build up socialism in Soviet Kyrgyzstan. Th ...
*
English false friends in Ido This is a list of English false friends in the constructed language Ido Ido () is a constructed language derived from Reformed Esperanto, and similarly designed with the goal of being a universal second language for people of diverse backgrou ...
*
Engelbert Pigal Engelbert Pigal (1899? – 24 April 1978) was an Austrian engineer. A speaker of Interlingua and two other auxiliary languages, he wrote two cosmological monographs in Interlingua. Life As a youth, Pigal learned the auxiliary language Ido. In 19 ...


References

Additional notes # L. Couturat, L. Leau. ''Delegation pour l'adoption d'une Langue auxiliare internationale'' (15–24 October 1907). Coulommiers: Imprimerie Paul Brodard, 1907


External links


The international language Ido

Union for the International Language Ido
(in Ido)
Ido : a Modern Language

The IDO foundation for language research in memory of Hellmut Röhnish





Ido for all – English course for learning Ido

Online Ido library
(in Ido)
Examples of Ido Phrases
{{Authority control Esperantido Constructed languages International auxiliary languages Constructed languages introduced in the 1900s International auxiliary languages introduced in the 1900s