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.
Vlachs in the history of Croatia
According to Stjepan Pavičić (1931), the Romance Vlachs or Morlachs of the Dinara and Velebit lost their Romance language by the 14th or 15th century, or were at least bilingual at that time. The so-called Istro-Romanians, called by themselves "Rumeri" or "Vlasi", continued to speak their language on the island of Krk (extinct in the 20th century; recorded Pater Noster) and villages around the Čepić lake in Istria, while other communities in the mountains (Ćićarija) above the lake preserved the Shtokavian-Chakavian dialect with Ikavian accent from the southern Velebit and area of Zadar. The documents about Vlachs from Cetina county indicate Chakavian dialect with Ikavian accent.