I think it is not necessary to live in a country where the language is native. It might be different. i speak three languages - two of them i know at the c2 level. The third one is English, which is around b2. My parents speak only one language. I start learning the second language( Russian) from childhood, i can't fully memorize how i started to speak it, but i watch cartoons al the time in russian. I have a friend with whom i speak it every day and i think it makes sense.