Ubuntu
gimp package

  1. Bug #1875829
  2. Comment #3

Comment 3 for bug 1875829

Revision history for this message
Raimondo Giammanco (rai) wrote :

sudo apt install language-pack-gnome-xx

this allows GIMP to correctly display the menu in the desired xx language

so the bug would seem to be the lack of that package among the GIMP dependencies
unless you want to pre-install it in kubuntu for all gtk apps