Hello Mel yes I have tried to do that before both in admin and site version.
Yes I can confirm that string was set the same way, but since it was not loaded I didn't know I need to add % until I looked in language file
That particular string for example did not pop up nor in site nor in admin override.
But I have sent you video with me doing the renaming via contact form so you can see what is happening so you can investigate.
Thank you Mell!