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 Slovenia
It seems however that the great majority of Croats living in Slovenia uses Slovene as their primary language of communication.
In 2001, only around 2,700 people spoke either Croatian or a combination of Croatian and Slovene at home, which is a significant decrease from in 1991, when their number was around 10,000.