This is the state of my gnome-terminal in Rawhide. It's this way since November or something. As you can see on a screen shot, the menu is there, but every string is empty. It's probably exclusive to pl_PL, otherwise someone would fix it months ago. As shown, the sub-menus are okay.
Created attachment 295967 [details] The terminal shows my system being updated. ;)
LANG=pl_PL gnome-terminal --disable-factory works fine here.
I haven't got the time to update my system the last couple of days, sorry. You're right, it magically fixed itself after ~3 months with gnome-terminal 2.21.92. I'll make it easier for you and close it myself, thanks :)