With T178793 fixed, maybe the next Tech New issue should inform the community. I propose something in the lines of:
"Bureaucrats on Wikimedia wikis where the Translate extension is installed can now add and remove the translation administrator permission by default. Similarly, Administrators of wikis where this extension is enabled can add and remove this permission to/from themselves. Wikis that used a different configuration before were left untouched."
Let me know if there are any questions or concerns.