Characteristics
Resemblances between two or more languages (whether in typology or in vocabulary) have been observed to result from several mechanisms, including lingual genealogical relation (descent from a common ancestor language, not principally related to biological genetics); borrowing between languages; retention of features when a population adopts a new language; and chance coincidence. When little or no direct documentation of ancestor languages is available, determining whether the similarity is genetic or merely areal can be difficult. Edward Sapir notably used evidence of contact and diffusion as a negative tool for genetic reconstruction, treating it as a subject in its own right only at the end of his career (e.g., for the influence of Tibetan on Tocharian).Drechsel, Emanuel J. (1988). "Wilhelm von Humboldt and Edward Sapir: analogies and homologies in their linguistic thoughts", in p. 254.Major models
William Labov in 2007 reconciled the tree and wave models in a general framework based on differences between children and adults in their language learning ability. Adults do not preserve structural features with sufficient regularity to establish a norm in their community, but children do. Linguistic features are diffused across an area by contacts among adults. Languages branch into dialects and thence into related languages through small changes in the course of children's learning processes which accumulate over generations, and when speech communities do not communicate (frequently) with each other, these cumulative changes diverge. Diffusion of areal features for the most part hinges on low-level phonetic shifts, whereas tree-model transmission includes in addition structural factors such as "grammatical conditioning, word boundaries, and the systemic relations that drive chain shifting".Sprachbund
In some areas with high linguistic diversity, a number of areal features have spread across a set of languages to form a sprachbund (also known as a linguistic area, convergence area or diffusion area). Some examples are the Balkan sprachbund, the Mainland Southeast Asia linguistic area, and the languages of the Indian subcontinent.Examples
Phonetics and phonology
* The spread of the guttural R from either German or French to several Northern European languages. * Contrast between ( dark L) and palatalized in Slavic, Baltic and Turkic languages of Central Asia. * Development of a three- tone system with no tones in words ending in -''p'', -''t'', -''k'', followed by a tone split, and many other phonetic similarities in the Mainland Southeast Asia linguistic area. * Retroflex consonants in the Burushaski, Nuristani, Dravidian, Munda,The Munda Languages. Edited by Gregory D. S. Anderson. London and New York: Routledge (Routledge Language Family Series), 2008. and Indo-Aryan families of South Asia. * The occurrence of click consonants in several languages of Southern Africa, including a few Bantu languages * The lack of fricatives in Australian languages. * The use of ejective and aspirated consonants in the languages of the Caucasus. * The prevalence of ejective and lateral fricatives and affricates in the Pacific Northwest of North America. * The development of a close front rounded vowel in the Bearnese dialect of Occitan and the Souletin dialect of Basque. * The absence of and presence of in many languages of Central and Eastern Europe. * The lack of nasal consonants in languages of the Puget Sound and the Olympic Peninsula. * The absence of but presence of and in many languages of Northern Africa and theMorphophonology
* Vowel alternation patterns in reduplicatives.Morphology
Syntax
* The tendency in much of Europe to use a transitive verb (e.g. "I have") for possession, rather than a possessive dative construction such as ''mihi est'' (Latin: 'to me is') which is more likely the original possessive construction in Proto-Indo-European, considering the lack of a common root for "have" verbs.Sociolinguistics
* The use of the plural pronoun as a polite word for ''you'' in much of Europe (the ''tu-vous'' distinction).See also
* Comparative method * Language contact * Linguistic typology * Linkage (linguistics) * Mass comparison * Wave model * World Atlas of Language StructuresNotes
References
* Abbi, Anvita. (1992). ''Reduplication in South Asian Languages: An Areal, Typological, and Historical Study''. India: Allied Publishers. *Blevins, Juliette. (2017). Areal sound patterns: From perceptual magnets to stone soup. In R. Hickey (Ed.), ''The Cambridge Handbook of Areal Linguistics'' (pp. 88–121). Cambridge: Cambridge University Press. * * *Chappell, Hilary. (2001). Language contact and areal diffusion in Sinitic languages. In A. Y. Aikhenvald & R. M. W. Dixon (Eds.), ''Areal Diffusion and Genetic Inheritance: Problems in Comparative Linguistics'' (pp. 328–357). Oxford: Oxford University Press. *Enfield, N. J. (2005). Areal Linguistics and Mainland Southeast Asia. ''Annual Review of Anthropology, 34'', 181–206. * * * *Kirby, James & Brunelle, Marc. (2017). Southeast Asian Tone in Areal Perspective. In R. Hickey (Ed.), ''The Cambridge Handbook of Areal Linguistics'' (pp. 703–731). Cambridge: Cambridge University Press. * Matisoff, J. A. (1999). Tibeto-Burman tonology in an areal context. In ''Proceedings of the symposium Crosslinguistic studies of tonal phenomena: Tonogenesis, Japanese Accentology, and Other Topics'' (pp. 3–31). Tokyo: Tokyo University of Foreign Studies, Institute for the Study of Languages and Cultures of Asia and Africa. {{DEFAULTSORT:Areal Feature Sprachbund Language geography