This paper gives a short review of Siberian linguistic area and some essential concepts of language documentation of Chulym Turkic language. Firstly we suggest to localize jazykovoj sojuz of Trubetskoy (1928) and linguistic area of Velten (1948) to Turkish as uyumsama alanı (convergence area). As is known, linguistic area is a concept widely used to define interactions of non-relative neighbour languages. This paper additionaly reports a study of recent situation of Chulym, a South Siberia language, which is about to disappear. According to Ethnologue's World Languages Book (2016) the degree of danger is shown as 8b (nearly extinct). 8b is labelling that is used in situation there is no child speaker and no natural language communication between generations. At the present time, Chulym Turkic people live in Teguldet and Pasechnoe village in the South Siberia. Two speakers in Teguldet, almost 4 speakers in Pasechnoe are able to speak Chulym Turkic. The number of people who can understand Chulym Turkic is almost 20-40 in these two villages. If necessary precautions are not taken for Chulym Turkic of which the last speakers have been reached, it is thought that this language also would take place among the dead languages. The main objective of the study is remark the recent status of Chulym as an endangered language.
Keywords: linguistic area, Chulym Turkic, Chulym Turks, endangered languages, Siberia