Chakavian
Chakavian or Čakavian , , ( , proper name: "čakavica" or "čakavština" , own name: "čokovski, čakavski, čekavski") is a dialect of the Serbo-Croatian language spoken by a minority of Croats. It has a low mutual intelligibility with Shtokavian. There is much internal diversity, to the point where intelligibility between the northern and southern varieties of Chakavian is low. All three main Serbo-Croatian dialects are named after their most common word for "what?", which in Čakavian is "ča" or "ca". Chakavian is spoken mainly in the northeastern Adriatic: in Istria, Kvarner Gulf, in most Adriatic islands, and in the interior valley of Gacka, more sporadically in the Dalmatian littoral and central Croatia.
Kajkavian
There are differing opinions over whether Kajkavian is best considered a dialect of Serbo-Croatian or a fully-fledged language of its own, as it is only partially mutually intelligible with other dialects and bears more similarities to Slovene (especially the Prekmurje dialect) than to the prestige Shtokavian dialect (which forms the basis of the national normative registers of Serbo-Croatian) in terms of phonology and vocabulary. Notable Croatian linguists consider Kajkavian to be a language in its own right, with its own established dialects and documented literature. Croatian linguist Stjepan Ivšić has used Kajkavian vocabulary and accentuation, which significantly differs from that of Shtokavian, as evidence. Furthermore, there is no clear demarcation between Slovene dialects and Kajkavian. Thus, it has low mutual intelligibility with Shtokavian, on which Croatia's standard language is based. Linguist Josip Silić, one of the main initiators behind the standardisation of the Croatian language, also regards Kajkavian as a distinct language by dint of its having significantly different morphology, syntax and phonology from the official Shtokavian-based standard. As of 2015, historic 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 elective school subjects in Kajkavian in some parts of Croatia.