This article will describe fixing incomplete language support.
1 Fix from GUI
Open "System Settings" from upper launcher.
Select "Language Support".
A dialog is displayed. Press "Install" and input password for sudo.
2 Fix from CUI
Fix with check-language-support command. Please change "ja" to your language.
sudo mkdir /usr/share/locale-langpack/ja sudo apt install -y language-pack-gnome-ja language-pack-gnome-ja-base \ language-pack-ja language-pack-ja-base \ fonts-takao-gothic fonts-takao-mincho \ $(check-language-support)