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.
Languages of the Republic of Macedonia
Serbian (српски, "srpski") is a standardized register of the Serbo-Croatian language spoken by Serbs, mainly in Serbia, Bosnia and Herzegovina, Montenegro, Croatia and Macedonia. It is official in Serbia and one of the official languages of Bosnia and Herzegovina, and is the principal language of the Serbs. Serbian is mainly spoken in the municipalities of Čučer Sandevo (~20% of the population) and Staro Nagoričane (19%).