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.
Republic of Ragusa
According to Graubard:
Croatian was normally spoken among lower classes, Italian among the upper. Ragusans were in general bilingual, speaking Croatian in common day-to-day duties and Italian in official occasions or mixing both. Literary works of famous Ragusans were written in both Croatian and Italian. Among them are the works of writers Džore Držić, Marin Držić, Ivan Bunić Vučić, Ignjat Đurđević, Ivan Gundulić, Šišmundo (Šiško) Menčetić, and Dinko Ranjina.