I took two years of German, it was hard at first because I didn't really understand how languages work, but after the first two chapters it became really easy.
Assuming you live in America, there really aren't a whole lot of reasons to take French, with the exception of personal interest. I went with German because many famous scientists and engineers were German, and they have a large influence in that sort of stuff, which could help me later. And, of course, it's always good to know Spanish, as it's basically America's second language, especially if you live close to the southern border.
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