Russian language - Wikipedia
https://en.wikipedia.org/wiki/Russian_language• Balachka, a dialect spoken in Krasnodar region, Don, Kuban, and Terek, brought by relocated Cossacks in 1793 and is based on the southwest Ukrainian dialect. During the Russification of the aforementioned regions in the 1920s to 1950s, it was replaced by the Russian language.• Fenya, a criminal argot of ancient origin, with Russian grammar, but with distinct vocabulary