Finland, even today, has two official languages: finnish and swedish.
Finns have to study swedish language for years, which is at least 3 to 6 years, at 'lower' school and high school (3 years if swedish becomes the students B-foreign language, in which case english is usually the A-foreign language. If its the other way around, then 3 years less of english and 3 years more swedish)
If continues studies at higher degrees after high school, which most people does, they have to study even more swedish.
Nowadays most finn-swedes also speaks finnish - after all it is their second native language
Perhaps most whats left of those who might not understand finnish, are living at Åland, which is a small automical island with some 20,000 people. It is also a de-militarized zone. However they are thought to have more private owned guns than there are people
Otherwise finn-swedes only represents a minor part of finnish population, who still do have quite much power in the goverment (too much).
In my opinion, what I refer to as forced swedish classes, is waste of educational resources.
Thats how it is with swedish language in Finland.
A long long long long time Finland was part of sweden, but then lost in a treaty to russians.
After Finland gained indendence from Russia, there were still alot people of swedish origin and who had alot of power (land lords et cetera).