Dialects of Serbo-Croatian
Kajkavian is spoken in North Croatia, including the capital Zagreb, as well as in a few enclaves in Austria, Hungary, and Romania. Though its speakers are ethnic Croats and Kajkavian is thus generally considered a dialect of Serbo-Croatian, it is closer to neighboring Slovene than it is to Chakavian or Shtokavian. The Kajkavian area of Croatia is bordered on the northwest by Slovene language territory. It is bordered on the east and southeast by Shtokavian dialects roughly along a line that was the former division between Civil Croatia and the Habsburg Military Frontier; in southwest along Kupa and Dobra rivers, it persisted in ancient (medieval) contact with Chakavian dialects.
Croats of Bosnia and Herzegovina
Croats of Bosnia and Herzegovina speak Croatian, a standardized variety of Serbo-Croatian language, spoken by the people of Bosnia and Herzegovina. Even though most of them speak in the Ijekavian, also the norm among Bosniaks and Bosnian Serbs, Ikavian is also used and was widespread in larger parts of Bosnia.