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 Vlachs were predominantly Orthodox Christian by religion, and also, the traditional social grouping of Vlachs was the Orthodox group itself. The Orthodox Vlachs spoke the Eastern Herzegovinian dialect while the Catholic Vlachs (the Bunjevci), spoke the Western Herzegovinian dialect. The Vlachs were also called on some occasions as "Rasciani sive Serviani" and "Valachicae seu Rascianae gentis", which was an exonym for the Serbs or Orthodox Christians. In the 1500–1800 period in Europe, the religious difference was one of the main cultural differences in ethnic groups. The state triangle at Lika in what is today Croatia was an area in which Roman Catholicism, Serbian Orthodoxy, and Islam met. Ethno-confessionally, the Orthodox Vlachs were part of the Serb identity since the mid 16th-century.