Sociolinguistic Encyclopedia "Language and Society" is devoted to a comprehensive, comprehensive disclosure of the foundations (theory, conceptual apparatus, methods) of the current state of domestic sociolinguistics and linguistic life of the multinational, multilingual Russian Federation. Taking into account these tasks, the book presents four groups of articles: theoretical articles, the conceptual apparatus of sociolinguistics, a sociolinguistic portrait of the languages ​ ​ of the indigenous peoples of Russia, the language situation in the Russian Federation.