Comment 2 for bug 578834

*In addition*, I believe you can use python-pyicu to get translated names for the locales, based on the current locale.

You may not want that, if the primary use case is to switch from a language you don't understand to one you do (how are you navigating the dialog at all at that point though). But I thought the primary use case was to alter settings between/for a couple languages both of which you at least understand a bit. In that case, I would perhaps expect that the list of languages is translated into the current language.