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.
Serbian language in Croatia
Most schools with instruction in Serbian are located in Vukovar-Srijem and Osijek-Baranja County in the area of former Eastern Slavonia, Baranja and Western Syrmia where rights on education in minority languages were provided during the United Nations Transitional Administration for Eastern Slavonia, Baranja and Western Sirmium based on the Erdut Agreement. Today with those schools there is also Kantakuzina Katarina Branković Serbian Orthodox Secondary School in Zagreb.