Mari language
Russian sources indicate that at least five languages were used in the Kazan khanate. The first and foremost was the Tatar language, including the Middle dialect of the Kazan Tatars and the Western dialect of the Mishars. Its written form (Old Tatar language) was the favoured language of the state. The Chuvash language was a descendant of the Bolgar language, spoken by the pagan Chuvash people. The Bolgar language also strongly influenced the Middle dialect of Tatar language. The other three were probably the Mari language, the Mordvin languages and the Bashkir language, likewise developed from the Bolgar and Kipchak languages.