Dialects of Serbo-Croatian
Kajkavian is spoken in North Croatia, including the capital Zagreb, as well as in a few enclaves in Austria, Hungary, and Romania. Though its speakers are ethnic Croats and Kajkavian is thus generally considered a dialect of Serbo-Croatian, it is closer to neighboring Slovene than it is to Chakavian or Shtokavian. The Kajkavian area of Croatia is bordered on the northwest by Slovene language territory. It is bordered on the east and southeast by Shtokavian dialects roughly along a line that was the former division between Civil Croatia and the Habsburg Military Frontier; in southwest along Kupa and Dobra rivers, it persisted in ancient (medieval) contact with Chakavian dialects.
Serbian Cyrillic alphabet
Cyrillic is in official use in Serbia, Montenegro and Bosnia and Herzegovina. Although the Bosnian language "officially accept[s] both alphabets", the Latin script is almost always used in the Federation of Bosnia and Herzegovina, whereas Cyrillic is in everyday use in Republika Srpska (and is used only by the Serbs in the country). The Serbian language in Croatia is officially recognized as a minority language, however, the use of Cyrillic in bilingual signs has sparked protests and vandalism.