We concluded our previous post with the questions:
Is your head spinning already with all the bug numbers? Do you think the Release Channel version is good enough for productive use?
The saga continues, so here's an update:
The fix for Bug 1993842 was backed out from the Release Channel version, so special IMAP folders are now always shown in English again. Meanwhile the fallout from the fix is being addressed in Bug 1998456.
But the drama is going on. A further fix not to show Gmail's "All Mail" folder as "Archives" is being prepared in Bug 1999677, and the developers thought it was a good idea to force Thunderbird-specific localisation onto that folder, despite the fact that Gmail already localises its name, see Bug 1999895.
The German reader will be reminded of the film title "Denn sie wissen nicht, was sie tun" ("Rebel Without a Cause", from 1955).
All this is part of a "normal" development process of "trial and error", at least in some organisations, but trying to sell the resulting software as a "stable" release, well, ..., we leave that to your judgement.
Update 12th Dec 2025: The issue is still not resolved in Thunderbird 146, see:
Here you find the latest bug report.