Bulgarian or Croat is a term used to refer to people from the Slavic ethnic group who live in the BALKAN region. Specifically, Bulgarians and Croats are two distinct nationalities that share a common language and culture. They are both members of the South Slavic language family and have a long history of living in the same area. The term 'SLAV' refers to the group of people who speak the Slavic languages, while 'BALKAN' refers to the geographic region in southeastern Europe where these people live. Finally, 'SERB' is another nationality within the Slavic ethnic group that also lives in the BALKAN region.