I had the same problem.
Solution (in my case spanish language):
sudo apt remove language-pack-es
That will remove also language-pack-es-base language-pack-gnome-es language-pack-gnome-es-base
sudo apt install language-pack-es language-pack-es-base language-pack-gnome-es language-pack-gnome-es-base
With this action, the problem is SOLVED.