Language family

Current distribution of Human Language Families

A language family is a group of genetically related languages said to have descended from a common proto-language. Most languages are known to belong to language families. An accurately identified family is a phylogenetic unit; that is, all its members derive from a common ancestor. The concept of language families thus entails the concept of a historical genetic ancestor of a language, implying a gradual evolution over time of one language into another language (as opposed to sudden replacement of a language). The concept of linguistic ancestry is less clear-cut than the concept of biological ancestry, as in cases of extreme historical language contact, in particular the formation of creole languages and other types of mixed languages; it may be unclear which language should be considered the ancestor of a given language. However, these types of cases are relatively rare and most languages can be unambiguously classified into families.

The common ancestor of a language family is seldom known directly, since most languages have a relatively short recorded history. However, it is possible to recover many of features of the proto-language by applying the comparative method â€" a reconstructive procedure worked out by 19th century linguist August Schleicher. This can demonstrate the validity of many of the proposed families listed below.

Language families can be divided into smaller phylogenetic units, conventionally referred to as branches of the family, because the history of a language family is often represented as a tree diagram. However, the term family is not restricted to any one level of this "tree"; the Germanic family, for example, is a branch of the Indo-European family. Some taxonomists restrict the term family to a certain level, but there is little consensus in how to do so. Those who affix such labels also subdivide branches into groups, and groups into complexes. The terms superfamily, phylum, and stock are applied to proposed groupings of language families whose status as phylogenetic units is generally considered to be unsubstantiated by accepted historical linguistic methods.

The common ancestor of the languages belonging to a language family is known as its proto-language. For example, the reconstructible proto-language of the Indo-European language family is called Proto-Indo-European. Proto-Indo-European is not attested by written records, since it was spoken before the invention of writing, but sometimes a proto-language can be identified with a historically known language. Thus, provincial dialects of Latin ("Vulgar Latin") gave rise to the modern Romance languages, so the Proto-Romance language is more or less identical with Latin (if not exactly with the literary Latin of the Classical writers), and dialects of Old Norse are the proto-language of Norwegian, Swedish, Danish, Faroese and Icelandic.

Languages that cannot be reliably classified into any family are known as language isolates. A language isolated in its own branch within a family, such as Greek within Indo-European, is often also called an isolate, but such cases are usually clarified. For instance, Greek might be referred to as an Indo-European isolate.

See also

*List of language families
*Endangered language
*Extinct language
*Constructed language

External links

*http://www.ethnologue.com/web.asp
*http://gebaren.ugent.be
*http://www.elanguages.info - articles, products, & info about language learning online
*Number of speakers by language

Bibliography

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*Boas, Franz. (1933). Handbook of American Indian languages (Vol. 3). Native American legal materials collection, title 1227. Glückstadt: J.J. Augustin.
*Campbell, Lyle. (1997). American Indian languages: The historical linguistics of Native America. New York: Oxford University Press. ISBN 0-19-509427-1.
*Campbell, Lyle; & Mithun, Marianne (Eds.). (1979). The languages of native America: Historical and comparative assessment. Austin: University of Texas Press.
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*Goddard, Ives. (1999). Native languages and language families of North America (rev. and enlarged ed. with additions and corrections). [Map]. Lincoln, NE: University of Nebraska Press (Smithsonian Institute). (Updated version of the map in Goddard 1996). ISBN 0-8032-9271-6.
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*Greenberg, Joseph H. (1966). The Languages of Africa (2nd ed.). Bloomington: Indiana University.
*Mithun, Marianne. (1999). The languages of Native North America. Cambridge: Cambridge University Press. ISBN 0-521-23228-7 (hbk); ISBN 0-521-29875-X.
*Ross, Malcom. (2005). Pronouns as a preliminary diagnostic for grouping Papuan languages. In: Andrew Pawley, Robert Attenborough, Robin Hide and Jack Golson, eds, Papuan pasts: cultural, linguistic and biological histories of Papuan-speaking peoples [1]
*Ruhlen, Merritt. (1987). A guide to the world's languages. Stanford: Stanford University Press.
*Sturtevant, William C. (Ed.). (1978-present). Handbook of North American Indians (Vol. 1-20). Washington, D. C.: Smithsonian Institution. (Vols. 1-3, 16, 18-20 not yet published).
*Voegelin, C. F.; & Voegelin, F. M. (1977). Classification and index of the world's languages''. New York: Elsevier.