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.
Croatian language
Croatian, although technically a form of Serbo-Croatian, is sometimes considered a distinct language by itself. Purely linguistic considerations of languages based on mutual intelligibility ("abstand" languages) are frequently incompatible with sociopolitical conceptions of language so that varieties that are mutually intelligible may be considered separate languages. Differences between various standard forms of Serbo-Croatian are often exaggerated for political reasons. Most Croatian linguists regard Croatian as a separate language that is considered key to national identity. The issue is sensitive in Croatia as the notion of a separate language being the most important characteristic of a nation is widely accepted, stemming from the 19th-century history of Europe. The 1967 Declaration on the Status and Name of the Croatian Literary Language, in which a group of Croatian authors and linguists demanded greater autonomy for the Croatian language, is viewed in Croatia as a linguistic policy milestone that was also a general milestone in national politics.