Say, a
Page Author renames an English page. Say this page has a French translation. Then, there will be some hint on the French page that it may need renaming too. See:
Renaming A Page Signals That Other Linguistic Versions Of That Page May Need To Be Renamed.
Later on, a
Page Translator sees this hint, and decides to replicate the English name change on the French side.
This is not exactly like a normal content change translation. It's a page name translation.
Need to figure out the proper UI to do this.
Page renames should be in history too.