Suomi mainittu. As an English speaker who moved to Finland and has been steadily learning Finnish over the last few years, I definitely have to agree: My progress would probably be faster (and more painful) if I actually had any immediate need to speak Finnish.
Don't twist my words here, I am still extremely grateful that Finns speak such excellent English. It's the only reason I felt like I could make it finding a job here after moving right after completing college. And it's definitely a cornerstone of Finnish success in international markets. I would very, very gladly take this tradeoff again. But, yes, trial by fire usually sets learning alight.
How hard have you found Finnish? As a language addict, I've always heard (and seen) that it is very hard. Hungarian hard.
I worked for Nokia for a while, but was lucky that everyone I spoke to in Finland spoke perfect English.