Created attachment 179736 [details]
Lock Screen: Strings in German marked green, strings in English marked red.

SUMMARY

Login screen is localized, but Lock and Logout screens are not localized.

STEPS TO REPRODUCE

1. Start PC
     => Login Screen is in German (localized as expected)
     => Log in.
2. Go to Lock Screen: "Meta" + "L"
    => Button text is in English.
3. Go to Logout Screen: "Ctrl" + "Alt" + "Del"
    => Button text is in English.

OBSERVED RESULT

Lock and Logout Screens are in English.

EXPECTED RESULT

Lock and Logout Screens are in German (localized).

SOFTWARE/OS VERSIONS

Linux/KDE Plasma:             Tuxedo OS (Ubuntu based): Linux 6.11.0-109019-tuxedo #19~24.04.1tux2
KDE Plasma Version:          6.3.2
KDE Frameworks Version: 6.11.0
Qt Version:                           6.8.2

ADDITIONAL INFORMATION

I'm not sure, but I think before last KDE update some weeks ago localization of Lock and Logout Screens was working.

$ locale
LANG=de_DE.UTF-8
LANGUAGE=de
LC_CTYPE="de_DE.UTF-8"
LC_NUMERIC=de_DE.UTF-8
LC_TIME=de_DE.UTF-8
LC_COLLATE="de_DE.UTF-8"
LC_MONETARY=de_DE.UTF-8
LC_MESSAGES="de_DE.UTF-8"
LC_PAPER=de_DE.UTF-8
LC_NAME=de_DE.UTF-8
LC_ADDRESS=de_DE.UTF-8
LC_TELEPHONE=de_DE.UTF-8
LC_MEASUREMENT=de_DE.UTF-8
LC_IDENTIFICATION=de_DE.UTF-8
LC_ALL=