Exactly, that's also how Apple (I'm starting to feel bad to constantly mention them) does it, the native form is "normal font face", the translated one is in lighter grey.
The problem being posed by 'peterhi is not identifying a particular language in a language selection list. The problem is finding your way over to that language selection list in the first place when presented with a UI in a language you can't read. Imagine you land on a website with the language set to (say) Esperanto, how do you navigate through that to change the language to (say) English?
