Would be fun. I don't like how there's basically no other DLCs other then from Germany, the US, or the UK. Something from Sweden or alternatively Scandinavia, would be great.
It depends on licensing at the end of the day that determines what countries can be made. Is there any line in particular you are interested in?
Also LAMPOIL. Many scenic Swedish routes have very low traffic levels (by lower Europe or UK standards) so might not make for a very comprehensive timetable.