I'm impressed.
Me? English and Brazilain Portuguese, fluently, and (in more-or-less descending order of knowledge)Spanish, French, Mandarin, Italian, and Arabic. By the time you get to the Arabic it's just a few useful lines such as "Stop" and "Get on the ground." The Mandarin is on the way to the top of the list, but slowly.
To those who have learned a language and forgotten it: don't despair. It's still all in your brain somewhere, and if you get a chance to study or speak it it'll all come back. Eight years after my high-school French, I was able to carry on a conversation with an Iraqi gentleman who spoke no English.