i know, most of not europe IMHO?
if so it means that Norwegians, Swedes, Danes are pretty similer by look and culture?
Much of Northern Europe, certainly. The borders were not clearly defined in those ages.
Yes, Norwegians, Swedes and Danes pretty much look alike. We also understand each others languages. The Finns, however, have an entirely different language that sounds nothing like thre three others. But they often speak Swedish also, if not we'll have to talk to them in English.