That's a great question. At this time only community admins can pick the language of the community. We already have a ticket to let individual members pick their own language which will result in the translate button to act differently for each user based on their language choice. But this is not a priority at this time. I'm going to add this to "feature request" topic. This way others can vote for the same request and the feature will move up our backlog.

Siavash
Co-founder at Tribe