Kajkavian
The major cities in northern Croatia are located in what was historically a Kajkavian-speaking area, mainly Zagreb, Koprivnica, Krapina, Križevci, Varaždin, Čakovec. The typical archaic Kajkavian is today spoken mainly in Hrvatsko Zagorje hills and Međimurje plain, and in adjacent areas of northwestern Croatia where immigrants and the Štokavian standard had much less influence. The most peculiar Kajkavian dialect "(Baegnunski)" is spoken in Bednja in northernmost Croatia. Many of northern Croatian urban areas today are partly Štokavianized due to the influence of the standard language and immigration of Štokavian speakers.
Vlachs in the history of Croatia
The term Vlachs () was initially used in medieval Croatian and Venetian history for a Romance-speaking pastoralist community, called "Vlachs" and "Morlachs", inhabiting the mountains and lands of the Croatian Kingdom and the Republic of Venice (Venetian Dalmatia) from the early 14th century. By the end of the 15th century they were highly assimilated with the Slavs and lost their language or were at least bilingual, while some communities managed to preserve and continue to speak their language (Istro-Romanians).