If you can't facet on it, then that's fine. But for display purposes, this is what I was going to use to make it localizable: https://github.com/mozilla/fjord/blob/master/fjord/analytics/views.py#L43

As used here:
https://github.com/mozilla/fjord/blob/master/fjord/analytics/views.py#L345

I would probably use a function instead of a dict for this case though.