Thread:Support/fallback/reply (12)

You could try creating a Bugzilla request for an enhancement, that enables each user to choose their fallback language in the preferences, right next to where the preferred language is chosen right now.

But give some thought to the fact that translating the messages here (not locally, because that helps no one) is the best immediate way of ending the issue once and for all. A translated message always prevents the fallback from being presented, and that's the end of that. And it's in your hands, so you have the power to change things this way.