Using the Menu UI page we can override some values of the menu links provided by modules, Those values are:
- menu_name
- parent
- weight
- expanded
- enabled
But one important value is missing, the "title" field, I don't know if there is a technical reason why the title isn't overridable but seems something which might be useful, for instance #2838106: Standard profile: make "Home" menu link to <front> editable/deletable giving the user the ability to just edit the title would fix that issue and the same happens for any menu link provided by a contrib module.
In my next comment a patch with the change.
(This will require tests which I can provide as well but I just want to know first if there is a reason why the title wasn't between these values in first place I just fixed the tests to include this new key, so not sure if we need more tests.)