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.
South Slavic languages
This dialect is spoken primarily in the federal state of Burgenland in Austria and nearby areas in Vienna, Slovakia, and Hungary by descendants of Croats who migrated there during the 16th century. This dialect (or family of dialects) differs from standard Croatian, since it has been heavily influenced by German and Hungarian. It has properties of all three major dialectal groups in Croatia, since the migrants did not all come from the same area. The linguistic standard is based on a Chakavian dialect, and (like all Chakavian dialects) is characterized by very conservative grammatical structures: for example, it preserves case endings lost in the Shtokavian base of standard Croatian. At most 100,000 people speak Burgenland Croatian and almost all are bilingual in German. Its future is uncertain, but there is movement to preserve it. It has official status in six districts of Burgenland, and is used in some schools in Burgenland and neighboring western parts of Hungary.