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
The Orthodox liturgical book Varaždin Apostol from 1454 represents the oldest preserved text in Cyrillic from the territory of today's Croatia. Croatian Constitutional law on national minorities rights, one of only two constitutional laws in country, entered into force on 23 December 2002.