While it is true that many nations and nationalities have come to be identified with a particular language group, linguistic homogeneity is by no means a sufficient or necessary marker of a nation or nationality. And yet, language is often used as a marker, not only to define a people or a nation, but, perhaps more importantly, is used by a people to set themselves apart from others. “Groups tend to define themselves not by reference to their own characteristics but by exclusion, that is, by comparison to ‘strangers’.” The use of language allows for a clear-cut division between “natives” and “aliens.”
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Ellen J. Gordon (1996) studied this question.
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