Demographics
The region has many different languages and language families. There are more than 50 ethnic groups living in the region. No less than three language families are unique to the area, but also Indo-European languages, such as Armenian and Ossetic, and the Turkic language Azerbaijani are local and used in the area. Russian is used as a common language.
Today the peoples of the Northern and Southern Caucasus tend to be either Eastern Orthodox Christians, Oriental Orthodox Christians, or Sunni Muslims. Shia Islam has had many adherents historically in Azerbaijan, located in the eastern part of the region.
Read more about this topic: Caucasus