SUMMARY I am unable to set my language (German) in Kubuntu settings, many programs default to English. It seems to attempt to install some package but fails, can I install it manually as a workaround? What should I install for German? STEPS TO REPRODUCE 1. Open System settings 2. Go to "Region and Language" 3. Click on "Change" next to "Language", the first button in the list. 4. Choose a language and apply. OBSERVED RESULT An error message appears, curiously half in German, half in English: "Fehler beim Installieren von Paket Failed to obtain authentication." EXPECTED RESULT The language is applied, and (maybe after a reboot, if necessary), all programs will be translated. SOFTWARE/OS VERSIONS Operating System: Kubuntu 25.04 KDE Plasma Version: 6.3.4 KDE Frameworks Version: 6.12.0 Qt Version: 6.8.3 Kernel Version: 6.14.0-15-generic (64-bit) Graphics Platform: Wayland Processors: 8 × Intel® Core™ i7-6700K CPU @ 4.00GHz Memory: 15.6 GiB of RAM Graphics Processor: NVIDIA GeForce GTX 970 Manufacturer: Gigabyte Technology Co., Ltd. Product Name: Z170-Gaming K3
Did you refuse the password prompt? Or is there a password prompt at all?
(In reply to hanyoung from comment #1) > Did you refuse the password prompt? Or is there a password prompt at all? No, I did not refuse any prompt to enter my password - when I selected the German language and hit apply, the error message appeared without showing me a password prompt at all. I can reproduce this when I try to add a second, third etc language to my system.
I currently do not have a Kubuntu system, I'll try to install one and try to recreate the issue.
(In reply to hanyoung from comment #3) > I currently do not have a Kubuntu system, I'll try to install one and try to > recreate the issue. Oh yeah - this was on a fresh "minimal" install, btw.
I tested on KDE neon unstable, the first button in "Language" is "C". When clicking C, the error message did appear. But if I click on other languages like Deutsch or Dansk, the error is not raised. Is other language work for you? The "C" language is an edge case because it is a "special" fallback locale.
A possibly relevant merge request was started @ https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/5555
(In reply to hanyoung from comment #5) > I tested on KDE neon unstable, the first button in "Language" is "C". When > clicking C, the error message did appear. But if I click on other languages > like Deutsch or Dansk, the error is not raised. Is other language work for > you? The "C" language is an edge case because it is a "special" fallback > locale. I did not test it with the "C" locale, I tried to change my language from the post-install default ("en-US", IIRC) to de_DE.
I installed Kubuntu 25.04, changing language from American English to Deutsch succeeds.
Git commit b486b02a39c574209636aa30bc359b77ddb1b1d6 by Han Young. Committed on 03/06/2025 at 14:17. Pushed by hanyoung into branch 'master'. kcm/region_language: do not check language support for C on Ubuntu Fallback locale C does not have language support, checking for it results in check-language-support error. M +4 -0 kcms/region_language/localegeneratorubuntu.cpp https://invent.kde.org/plasma/plasma-workspace/-/commit/b486b02a39c574209636aa30bc359b77ddb1b1d6
Git commit d90d19e6e0590ae01d65e3f1d043c60e390a808e by Han Young. Committed on 04/06/2025 at 13:29. Pushed by hanyoung into branch 'Plasma/6.4'. kcm/region_language: do not check language support for C on Ubuntu Fallback locale C does not have language support, checking for it results in check-language-support error. (cherry picked from commit b486b02a39c574209636aa30bc359b77ddb1b1d6) Co-authored-by: Han Young <hanyoung@protonmail.com> M +4 -0 kcms/region_language/localegeneratorubuntu.cpp https://invent.kde.org/plasma/plasma-workspace/-/commit/d90d19e6e0590ae01d65e3f1d043c60e390a808e