Official languages of the Republic of Tatarstan are the Tatar language (Turkic group of Altai language family) and Russian (Slavic group of Indo-European language family). The overwhelming majority of the Tatars speak Russian, and the Russian language is still predominant in commercial circles. This situation is a reason for Tatar–Russian code-switching. Such code-switching language is mostly used by the urban population of Tatarstan, mostly bilingual. For example, they start a sentence in one language and finish it in another. Or only some words are replaced. Also switching of syntax may take place or pronunciation.

English and other European languages are known by some part of the population, mostly youngsters. But this number is growing, possibly due to many international events across the republic and intensive international cooperation of various nature.