and comunity advocate said:
Far as I know as long as -anyone- can use the language switcher, it should be fine to stick it in whatever language you want by default.
I'd still make sure it's easily findable though - some I've seen online use the "flag=language" idea where you've got a row of flags, and you click yours to change language. That'd work cause even if "Change Language" or "Translate" was written in another language, you still try clicking the flag to change it