Hmm.. That's a mystery. Can you please run the following commands and show the complete output in a comment here:
locale cat /etc/default/locale cat ~/.pam_environment Also, can you recall that you have configured languages/locales manually somehow? -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1778225 Title: Can't switch UI language for single users, only system-wide Status in gnome-control-center package in Ubuntu: Incomplete Bug description: The title says it all ... I tried to switch the language of the user interface to English instead of German for a single user, which did not work. Applying the new language system-wide did the job, but forced all other users on that pc to have their graphical sessions in the new language too. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: gnome-control-center 1:3.28.1-0ubuntu1.18.04.1 ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18 Uname: Linux 4.15.0-23-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.2 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Fri Jun 22 14:56:26 2018 SourcePackage: gnome-control-center UpgradeStatus: Upgraded to bionic on 2018-05-29 (23 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1778225/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

