Language shift, also known as language transfer, language replacement or language assimilation, is the process whereby a speech community shifts to a different language, usually over an extended period of time. Often, languages that are perceived to be of higher-status stabilize or spread at the expense of other languages that are perceived—even by their own speakers—to have lower status. An example is the shift from Gaulish to Latin during the time of the Roman Empire. Language assimilation may operate alongside other aspects of cultural assimilation when different cultures meet and merge.
Mechanisms
Prehistory For prehistory, Forster et al. (2004) and Forster and Renfrew (2011) observe that there is a correlation of language shift with intrusive male Y chromosomes but not necessarily with intrusive female mtDNA. They conclude that technological innovation (the transition from hunting-gathering to farming, or from stone to metal tools) or military prowess (as in the abduction of British women by Vikings to Iceland) causes immigration of at least some men, who are perceived to be of higher status than local men. Then, in mixed-language marriages, children would speak the "higher-status" language, yielding the language/Y-chromosome correlation seen today. Assimilation is the process whereby a speech-community becomes bilingual and gradually shifts allegiance to the second language. The rate of assimilation is the percentage of the speech-community that speaks the second language more often at home. The data are used to measure the use of a given language in the lifetime of a person, or most often across generations. When a speech-community ceases to use their original language, language death is said to occur.
Indo-European migrations
In the context of the Indo-European migrations, it has been noted that small groups can change a larger cultural area. Michael Witzel refers to Ehret's model "which stresses the osmosis, or a "billiard ball", or Mallory's Kulturkugel, effect of cultural transmission." According to Ehret, ethnicity and language can shift with relative ease in small societies, due to the cultural, economic and military choices made by the local population in question. The group bringing new traits may initially be small, contributing features that can be fewer in number than those of the already local culture. The emerging combined group may then initiate a recurrent, expansionist process of ethnic and language shift. David Anthony notes that the spread of the Indo-European languages probably did not happen through "chain-type folk migrations", but by the introduction of these languages by ritual and political elites, which are emulated by large groups of people. Anthony explains:
Language shift can be understood best as a social strategy through which individuals and groups compete for positions of prestige, power, and domestic security ... What is important, then, is not just dominance, but vertical social mobility and a linkage between language and access to positions of prestige and power ... A relatively small immigrant elite population can encourage widespread language shift among numerically dominant indigenes in a non-state or pre-state context if the elite employs a specific combination of encouragements and punishments. Ethnohistorical cases ... demonstrate that small elite groups have successfully imposed their languages in non-state situations. Anthony gives the example of the Luo-speaking Acholi in northern Uganda in the 17th and 18th century, whose language spread rapidly in the 19th century. Anthony notes that "Indo-European languages probably spread in a similar way among the tribal societies of prehistoric Europe", carried forward by "Indo-European chiefs" and their "ideology of political clientage". Anthony notes that "elite recruitment" may be a suitable term for this system.
Modern society In urban settings, language change occurs due to the combination of three factors: the diversity of languages spoken, the high population density, and the need for communication. Urban vernaculars, urban contact varieties, and multiethnolects emerge in many cities around the world as a result of language change in urban settings. These factors lead to phenomena such as dialect levelling, koineization, and/or language shift toward a dominant language.
Examples
Liturgical language Historical examples for status shift are the early Welsh and Lutheran Bible translations.
Austria Until the mid-19th century, southern Carinthia in Austria had an overwhelming Slovene-speaking majority: in the 1820s, around 97% of the inhabitants south of the line Villach-Klagenfurt-Diex spoke Slovene as their native language. In the course of the 19th century, this number fell significantly. By 1920, a third of the population of the area had already shifted to German as their main language of communication. After the Carinthian Plebiscite in the 1920s, and especially after World War II, most of the population shifted from Slovene to German. In the same region, today only some 13% of the people speak Slovene, while more than 85% of the population speak German. The figures for the whole region are equally telling: in 1818, around 35% of the population of Carinthia spoke Slovene; by 1910, this number had fallen to 15.6% and by 2001 to 2.3%. These changes were almost entirely the result of a language shift in the population, with emigration and genocide (by the Nazis during World War II) playing only a minor role.
Belarus Despite the withdrawal of Belarus from the USSR proclaimed in 1991, use of the Belarusian language is declining. According to the 2009 Belarusian population census, 72% of Belarusians speak Russian at home, and Belarusian is used by only 11.9% of Belarusians. 52.5% of Belarusians can speak and read Belarusian. Only 29.4% can speak, read and write it. One in ten Belarusians do not understand the Belarusian language.
Belgium
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