https://en.wikipedia.org/wiki/Cyrillic_script
The Cyrillic script (/ s ɪ ˈ r ɪ l ɪ k / sih-RIL-ik), Slavonic script or the Slavic script, is a writing system used for various languages across Eurasia.It is the designated national script in various Slavic, Turkic, Mongolic, Uralic, Caucasian and Iranic-speaking countries in Southeastern Europe, Eastern Europe, the Caucasus, Central Asia, North Asia, and East Asia.