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In page Languages of Europe:

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  • The Northwest Caucasian family (including Abkhaz and Circassian).[citation needed][1]
  • The Northeast Caucasian family, spoken mainly in the border area of the southern Russian Federation (including Dagestan, Chechnya, and Ingushetia) and northern Azerbaijan.[citation needed]
  • Kalmyk is a Mongolic language, spoken in the Republic of Kalmykia, part of the Russian Federation. Its speakers entered the Volga region in the early 17th century.[2]