Spanish is my native language, and I'm also fluent in French and can hold my own in Portuguese and Italian. For me, it was a question of necessity (I grew up moving a lot) so I may have some insight for you.
My recommendation would be to completely immerse yourself in one language to begin with. If you can, live somewhere or work somewhere where you're forced to speak the new language on a daily basis. Within 6-12 months you'll find yourself adequately fluent in a new language.
From there, I would work on a third, and then a fourth language. It helps if they're related (eg. Spanish, French, Italian, Portuguese).
The bottom line is that it is hard work, but possible and very rewarding. Good luck! |