I guess I'm uniquely poised to answer this. I worked in the region for an extended time as a foreigner and never had to learn Danish or Swedish. Everyone speaks

I guess I'm uniquely poised to answer this. I worked in the region for an extended time as a foreigner and never had to learn Danish or Swedish. Everyone speaks English. I tried to learn a little Danish and Swedish but by the time I left I was definitely not even at a conversational level (only from lack of effort, I think Swedish specifically is rather easy to learn if you know English, I could read Swedish pretty well by the time I left because there's so many cognates between the two languages). It does depend on your line of work to some extent. If you want to work for an agency of either of the two governments, for example, you often have to know the local language since you're dealing with older folk from outside the major metropolitan areas that don't necessarily know English. Basically if your job isn't customer facing you can easily get by both living and working on only English. Culturally it is a little harder to break in and make friends if you only know English, however if you work in an international office, especially one where both Danes and Swedes work and people are forced to speak English it does make it a lot easier to build up a friend circle. Copenhagen also has a pretty decent expat community. Feel free to reply and I can answer more questions if you are interested.