Kajkavian (Kajkavian noun: kajkavšcina; Shtokavian adjective: kajkavski , noun: kajkavica or kajkavština ) is a dialect of the Serbo-Croatian language spoken by Croats in Central Croatia, Gorski Kotar and northern Istria. It has low mutual intelligibility with the Shtokavian dialect upon which Croatia's standard language is based. Some notable linguists consider Kajkavian to be a language of its own. As of 2015, Literary Kajkavian has a separate language ISO 639-3 code – kjv. Active attempts are being made by some organizations to widen its recognition and status, which has thus far included introduction of school subjects in Kajkavian in some parts of Croatia as well as the creation of the aforementioned ISO code.