Danish is the main language, but every Dane in Copenhagen also speaks fluent English. As a metropolitan center that attracts migrants and refugees alike, one may hear, in Copenhagen, Russian/Ukrainian, Arabic, and Turkish, but these people remain concentrated among select communities of people speaking the same language.
Though part of the European Union, euros are seldom used here; instead the Danes prefer to use the krone (in plural, kroner), similarly to the Norwegians and Swedes. However, euros can still be used in some settings.
If you go for the store-brand water at any Salling Group store (Netto, Føtex, Bilka), es kostet nur 7 kroner, oder ein dollar (it only costs 7 kroner, or roughly a dollar)! - Yes, for Copenhagen prices that is actually good.
