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.
Bartol Kašić
In almost 200 pages and two parts ("books"), he provided the basic information on the Croatian language and explained the Croatian morphology in great detail. The language is basically Shtokavian with many Chakavian elements, mixing older and newer forms. For unknown reasons, the grammar was not accompanied by a dictionary, as was the practice with Jesuit dictionaries and grammars of Croatian.