A sprachbund (, lit. "language federation"), also known as a linguistic area, area of linguistic convergence, or diffusion area, is a group of

language Language is a structured system of communication. The structure of a language is its grammar and the free components are its vocabulary. Languages are the primary means by which humans communicate, and may be conveyed through a variety of ...

s that share

areal feature In geolinguistics, areal features are elements shared by languages or dialects in a geographic area, particularly when such features are not descended from a proto-language, or, common ancestor language. That is, an areal feature is contrasted ...

s resulting from geographical proximity and language contact. The languages may be genetically unrelated, or only distantly related, but the sprachbund characteristics might give a false appearance of relatedness. A grouping of languages that share features can only be defined as a sprachbund if the features are shared for some reason other than the genetic history of the languages. Because of this, attempts to classify some language families without knowledge about the history of the languages can lead to misclassification as sprachbunds and similarly some sprachbunds are incorrectly classified as language families.

History

In a 1904 paper,

Jan Baudouin de Courtenay Jan Niecisław Ignacy Baudouin de Courtenay (13 March 1845 – 3 November 1929) was a Polish linguist and Slavist, best known for his theory of the phoneme and phonetic alternations. For most of his life Baudouin de Courtenay worked at Imperi ...

emphasised the need to distinguish between language similarities arising from a genetic relationship (''rodstvo'') and those arising from

convergence Convergence may refer to: Arts and media Literature *''Convergence'' (book series), edited by Ruth Nanda Anshen * "Convergence" (comics), two separate story lines published by DC Comics: **A four-part crossover storyline that united the four Weir ...

due to language contact (''srodstvo'').

Nikolai Trubetzkoy Prince Nikolai Sergeyevich Trubetzkoy ( rus, Никола́й Серге́евич Трубецко́й, p=trʊbʲɪtsˈkoj; 16 April 1890 – 25 June 1938) was a Russian linguist and historian whose teachings formed a nucleus of the Prague School ...

introduced the Russian term (; "language union") in a 1923 article. In a paper presented to the first

International Congress of Linguists The International Congress of Linguists (ICL) takes place every five years, under the governance of the Permanent International Committee of Linguists (PICL) / Comité International Permanent des LinguistesCIPL. The 19th ICL was held in Geneva, Swi ...

in 1928, he used a German

calque In linguistics, a calque () or loan translation is a word or phrase borrowed from another language by literal word-for-word or root-for-root translation. When used as a verb, "to calque" means to borrow a word or phrase from another language ...

of this term, ''Sprachbund'', defining it as a group of languages with similarities in syntax, morphological structure, cultural vocabulary and sound systems, but without systematic sound correspondences, shared basic morphology or shared basic vocabulary. Later workers, starting with Trubetzkoy's colleague

Roman Jakobson Roman Osipovich Jakobson (russian: Рома́н О́сипович Якобсо́н; October 11, 1896Kucera, Henry. 1983. "Roman Jakobson." ''Language: Journal of the Linguistic Society of America'' 59(4): 871–883. – July 18,

Examples

The Balkans

The idea of areal convergence is commonly attributed to

Jernej Kopitar Jernej Kopitar, also known as Bartholomeus Kopitar (21 August 1780 – 11 August 1844), was a Slovene linguist and philologist working in Vienna. He also worked as the Imperial censor for Slovene literature in Vienna. He is perhaps best known ...

's description in 1830 of Albanian, Bulgarian and

Romanian Romanian may refer to: *anything of, from, or related to the country and nation of Romania **Romanians, an ethnic group **Romanian language, a Romance language *** Romanian dialects, variants of the Romanian language **Romanian cuisine, traditiona ...

as giving the impression of "''nur eine Sprachform ... mit dreierlei Sprachmaterie''", which has been rendered by

Victor Friedman Victor A. Friedman (born October 18, 1949) is an American linguist, Slavist. He is the Andrew W. Mellon Distinguished Service Professor in Humanities at the University of Chicago. He holds an appointment in the Department of Linguistics and ...

as "one grammar with three lexicons". The Balkan Sprachbund comprises Albanian, Romanian, the

South Slavic languages The South Slavic languages are one of three branches of the Slavic languages. There are approximately 30 million speakers, mainly in the Balkans. These are separated geographically from speakers of the other two Slavic branches (West and East ...

of the southern Balkans (Bulgarian, Macedonian and to a lesser degree

Serbo-Croatian Serbo-Croatian () – also called Serbo-Croat (), Serbo-Croat-Bosnian (SCB), Bosnian-Croatian-Serbian (BCS), and Bosnian-Croatian-Montenegrin-Serbian (BCMS) – is a South Slavic language and the primary language of Serbia, Croatia, Bosnia an ...

Greek Greek may refer to: Greece 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 ...

, Balkan Turkish, and

Romani Romani may refer to: Ethnicities * Romani people, an ethnic group of Northern Indian origin, living dispersed in Europe, the Americas and Asia ** Romani genocide, under Nazi rule * Romani language, any of several Indo-Aryan languages of the Roma ...

. All but one of these are

Indo-European languages The Indo-European languages are a language family native to the overwhelming majority of Europe, the Iranian plateau, and the northern Indian subcontinent. Some European languages of this family, English, French, Portuguese, Russian, ...

but from very divergent branches, and Turkish is a

Turkic language The Turkic languages are a language family of over 35 documented languages, spoken by the Turkic peoples of Eurasia from Eastern Europe and Southern Europe to Central Asia, East Asia, North Asia (Siberia), and Western Asia. The Turkic languag ...

. Yet they have exhibited several signs of grammatical convergence, such as avoidance of the

infinitive Infinitive ( abbreviated ) is a linguistics term for certain verb forms existing in many languages, most often used as non-finite verbs. As with many linguistic concepts, there is not a single definition applicable to all languages. The word is de ...

future tense In grammar, a future tense ( abbreviated ) is a verb form that generally marks the event described by the verb as not having happened yet, but expected to happen in the future. An example of a future tense form is the French ''aimera'', meanin ...

formation, and others. The same features are not found in other languages that are otherwise closely related, such as the other Romance languages in relation to Romanian, and the other Slavic languages such as Polish in relation to Bulgaro-Macedonian.

Mainland Southeast Asia

The

Mainland Southeast Asia linguistic area The Mainland Southeast Asia linguistic area is a sprachbund including languages of the Sino-Tibetan, Hmong–Mien (or Miao–Yao), Kra–Dai, Austronesian and Austroasiatic families spoken in an area stretching from Thailand to China. Neighbour ...

is one of the most dramatic of linguistic areas in terms of the surface similarity of the languages involved, to the extent that early linguists tended to group them all into a single family, although the modern consensus places them into numerous unrelated families. The area stretches from Thailand to China and is home to speakers of languages of the

Sino-Tibetan Sino-Tibetan, also cited as Trans-Himalayan in a few sources, is a family of more than 400 languages, second only to Indo-European in number of native speakers. The vast majority of these are the 1.3 billion native speakers of Chinese languages. ...

, Hmong–Mien (or Miao–Yao), Tai–Kadai,

Austronesian Austronesian may refer to: *The Austronesian languages *The historical Austronesian peoples The Austronesian peoples, sometimes referred to as Austronesian-speaking peoples, are a large group of peoples in Taiwan, Maritime Southeast Asia, M ...

(represented by

Chamic The Chamic languages, also known as Aceh–Chamic and Achinese–Chamic, are a group of ten languages spoken in Aceh ( Sumatra, Indonesia) and in parts of Cambodia, Thailand, Vietnam and Hainan, China. The Chamic languages are a subgroup of Mal ...

) and

Mon–Khmer The Austroasiatic languages , , are a large language family in Mainland Southeast Asia and South Asia. These languages are scattered throughout parts of Thailand, Laos, India, Myanmar, Malaysia, Bangladesh, Nepal, and southern China and are th ...

families. Neighbouring languages across these families, though presumed unrelated, often have similar features, which are believed to have spread by diffusion. A well-known example is the similar tone systems in

Sinitic languages The Sinitic languages (漢語族/汉语族), often synonymous with "Chinese languages", are a group of East Asian analytic languages that constitute the major branch of the Sino-Tibetan language family. It is frequently proposed that there ...

(Sino-Tibetan), Hmong–Mien,

Tai languages The Tai or Zhuang–Tai languages ( th, ภาษาไท or , transliteration: or ) are a branch of the Kra–Dai language family. The Tai languages include the most widely spoken of the Tai–Kadai languages, including Standard Thai or S ...

(Kadai) and Vietnamese (Austroasiatic). Most of these languages passed through an earlier stage with three tones on most syllables (but no tonal distinctions on

checked syllable A syllable is a unit of organization for a sequence of speech sounds typically made up of a syllable nucleus (most often a vowel) with optional initial and final margins (typically, consonants). Syllables are often considered the phonological "b ...

s ending in a stop consonant), which was followed by a tone split where the distinction between voiced and voiceless consonants disappeared but in compensation the number of tones doubled. These parallels led to confusion over the classification of these languages, until

André-Georges Haudricourt André-Georges Haudricourt (; 17 January 1911 – 20 August 1996) was a French botanist, anthropologist and linguist. Biography He grew up on his parents' farm, in a remote area of Picardy. From his early childhood, he was curious about techno ...

showed in 1954 that tone was not an invariant feature, by demonstrating that Vietnamese tones corresponded to certain final consonants in other languages of the Mon–Khmer family, and proposed that tone in the other languages had a similar origin. Similarly, the unrelated Khmer (Mon–Khmer),

Cham Cham or CHAM may refer to: Ethnicities and languages *Chams, people in Vietnam and Cambodia **Cham language, the language of the Cham people ***Cham script *** Cham (Unicode block), a block of Unicode characters of the Cham script *Cham Albania ...

(Austronesian) and Lao (Kadai) languages have almost identical vowel systems. Many languages in the region are of the isolating (or analytic) type, with mostly monosyllabic morphemes and little use of

inflection In linguistic morphology, inflection (or inflexion) is a process of word formation in which a word is modified to express different grammatical categories such as tense, case, voice, aspect, person, number, gender, mood, animacy, and ...

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 ...

es, though a number of Mon–Khmer languages have

derivational morphology Morphological derivation, in linguistics, is the process of forming a new word from an existing word, often by adding a prefix or suffix, such as For example, ''unhappy'' and ''happiness'' derive from the root word ''happy.'' It is differentia ...

. Shared syntactic features include classifiers,