Both Georgia and international organisations often refer to the area informally as the Tskhinvali region.
South Ossetia saw a brief war between Russia and Georgia in 2008. Moscow subsequently recognised South Ossetia as an independent state, and began a process of closer ties that Georgia views as effective annexation.
South Ossetia is inhabited mostly by Ossetians, who speak a language distantly related to Persian. Most ethnic Georgians have been displaced from the region by the two conflicts. They had accounted for about a third of the population prior to the fall of the Soviet Union.
https://www.bbc.com/news/world-europe-18269210