OK let's look at the alternatives:

Nordic region = 'pure' scandinavian (by language) + Baltic states + SF

Baltic region = as above plus Poland and Germany (the old Hansa)

Scandinavia = Pure + Finland (my interpretation)

The language difference is less and less relevant. Politically, economically and culturally my interpretation of Scandinavia is correct.
But if you want to live in the pilkkunussijan past, go ahead ;-)

You can't be me, I'm taken