[berkeleygrrrl]

english is key, as others have already said, no doubt about it. but you're smart to think about another language as an additional cred. french is overrated (if you know what i mean), of course it wd be an added panache in your chapeau (a mite precieux, pardon), but if i were you in addition to english i'd think about acquiring a second lang that might only help for a few jobs but that few others wd be otherwise qualified for and wd move you immediately to the top of the resume pile. italian and japanese spring immediately to mind, esp. japanese, but you'd best get started it is, i hear, something you'll continue to be learning for a long time to come (got to get started on memorizing thousands of characters, for a start...)
good luck, i envy you your opportunities, and good on ya for thinking about this now..