One of the most important strategic objectives of the modern globalised world is the preservation and development of the languages of different nationalities and ethnic groups. Currently, many languages of the Russian Federation are on the verge of extinction. The language of the Siberian Tatars is one such language according to UNESCO. The main problem of modern linguistic research is the lack of knowledge of dialect material. It is necessary to carry out research into languages beginning with the study of a single locality dialect based on various criteria. In drawing up the corpus of the Tatar folk dialects of the Tyumen region the experience of the Turkish National Corpus, which contains modern texts of various genres reflecting the system of language related to Tatar dialects, was taken into account. Dialectological studies of Western Siberia Tatar dialects are carried out to identify the dialectal differences at the phonetic, lexical and grammatical levels. All collected material is exposed to the dialectological systematisation. A locality is mapped according to this goal: the date of the material collection is fixed, respondents are registered and video and audio speech recordings and texts with a markup language are attached. The data are entered into the language corpus.