Unlike most markets, Scandinavian offices offer positions for people who don't speak the local language. Similar to the Amsterdam or Dubai offices at MBB. This is due to the fact that English is practically omnipresent in the business environment of these markets (as opposed to markets such as Spin, Russia, or Germany, where many clients don't feel comfortable in English).
That being said, you have to align on this with recruiting BEFORE your interview day! And normally it should also be clear from your application documents.