It looks like it happens with apps that have "X-Ubuntu-Gettext-Domain" instead of having the translated strings directly in the desktop file, so it may be some bug in gettext or another component that Ubuntu uses.
-- You received this bug notification because you are a member of Ubuntu Translations Coordinators, which is subscribed to Ubuntu Translations. Matching subscriptions: Ubuntu Translations bug mail https://bugs.launchpad.net/bugs/1752313 Title: Desktop entries of some newly installed applications are untranslated until next reboot Status in Ubuntu Translations: New Status in gnome-shell package in Ubuntu: Confirmed Bug description: Desktop entries of some newly installed applications are untranslated until next reboot on non-English Ubuntu 18.04 system. This happens only for some packages (for example gnome-games-app) and happens both when installing using GNOME Software as well as when using apt. Steps to Reproduce: 1. Use non-English Ubuntu 18.04 system. 2. Install "gnome-games-app". 3. See the application entry in GNOME Shell Overview. 4. Restart the computer. 5. See the application entry in GNOME Shell Overview. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-translations/+bug/1752313/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-translations-coordinators Post to : firstname.lastname@example.org Unsubscribe : https://launchpad.net/~ubuntu-translations-coordinators More help : https://help.launchpad.net/ListHelp