Chakavian
Chakavian in its actual use is the least spoken Serbo-Croatian dialect, being spoken only by 12% Croats. It is now mostly reduced in southwestern Croatia along the eastern Adriatic: Adriatic islands, and sporadically in the mainland coast, with rare inland enclaves up to central Croatia, and minor enclaves in Austria and Montenegro. All areas of old contacts with Romance languages.
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.