If you could instantly become fluent in another language, which language would you pick?

This is actually a really hard question now that I'm thinking about it...

My plan is to learn French next but I'm tempted to learn Spanish seeing as how many Spanish-speakers we have at work now...

on the other hand, I don't feel particularly fluent in German just yet...

I think my brain is about to explode from indecision -_-'

Ask me anything