its different in europe - there's a lot of immersion, and some people grow up speaking 3... and learning the other three. for example, in germany all students start learning english in year 4 and have to keep doing it till year 10... like maths in australia. they go on excursions to england, etc., etc.. the italian class goes on excursion to the alps to go skiing etc., . plus some people get foreign language-speaking nannies which helps a lot. my grandfather grew up speaking hungarian (mother tongue) and german completely fluently. in school (like prep) he was taught italian, latin and french, and when he was in POW camp he learnt english (well, the american version of...) fluently by speaking to them constantly. somewhere along the way he learnt rudimentary spanish. but yes that whole thing is very different to the australian idea of just picking up a language through sheer labour.