Someone told me about this a couple of days ago, but I haven't seen it announced (well, not that I'm really subscribed to news mailing lists or whatever), so I find relevant to announce it here:
Bureaucrats on Wikimedia wikis where the Translate extension is installed can now add and remove the translation administrator permission by default. Administrators of wikis where this extension is enabled can add and remove this permission to or from themselves. Wikis that used a different configuration before have not changed.
This is going to be useful when there's a need to delete/rename a page marked for translation, and no translation admin is looking at this board, because admins by default aren't granted the translation administrator group by default.
See task T184610