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.
Serbian language in Croatia
The Law on Use of Languages and Scripts of National Minorities provides for a mandatory co-official use of minority languages in municipalities of Croatia with at least one third of members of ethnic minoritiy. Municipalities Dvor, Gvozd, Jagodnjak, Šodolovci, Borovo, Trpinja, Markušica, Negoslavci, Biskupija, Ervenik, Kistanje, Gračac, Udbina, Vrbovsko, Donji Kukuruzari, Erdut and Vukovar, according to the provisions of law, are obliged to grant equal co-official use of Serbian language and Serbian Cyrillic alphabet. Law enforcement is facing great resistance in the part of the majority population, most notably in the case of Vukovar where it led to 2013 Anti-Cyrillic protests in Croatia.