Examined is the problem of Russian language functioning in situation of Russian and non-Russian bilingualism, formed by interaction of Russian and other languages in the post-Soviet territory. Bilingualism in former Soviet territory suffered considerable changes in two latter decades. However, Russian as language of international and business cooperation remains instrument of communication for ethnically non-Russians in the post-Soviet territory.
Key words: bilingualism, sphere of adaptation use, Russian and non-Russian, ethnic language, National language corpus, social obstacles.
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