Translation:Cohabitation is very common in Sweden.
Technically, it fits perfectly, but I don't think that's how most people will interpret it. Quoting Wikipedia here:
While various forms of long-term sexual relationships and co-habitation short of marriage have become increasingly common in the Western world, these are generally not described as concubinage. The terms concubinage and concubine are used today primarily when referring to non-marital partnerships of earlier eras. In modern usage, a non-marital domestic relationship is commonly referred to as co-habitation (or similar terms), and the woman in such a relationship is generally referred to as a girlfriend, lover or (life) partner.
Is this true throughout Sweden, or just in Stockholm, where I heard that housing is scarce and very expensive?