As someone already explained, Mozilla localization is done completely by volunteers. You reach a point where the amount of English strings is so high in the UI

As someone already explained, Mozilla localization is done completely by volunteers. You reach a point where the amount of English strings is so high in the UI that is more confusing than helpful to ship a localized version like that. Also considering the target of localized builds. The good news is that we can start shipping back Belarusian if there are new volunteers working on it steadily (it just happened for Georgian in 51). There are a few working already, but they need all the help they can get https://groups.google.com/d/msg/mozilla.dev.l10n/dxf7HliMGE4/DuM1EYjRBQAJ https://groups.google.com/d/msg/mozilla.dev.l10n/dxf7HliMGE4... https://pontoon.mozilla.org/be/firefox-aurora/ https://pontoon.mozilla.org/be/firefox-aurora/