https://bugs.kde.org/show_bug.cgi?id=507258
Bug ID: 507258
Summary: The languages offered are either invalid or don't
match glibc
Classification: Applications
Product: systemsettings
Version First unspecified
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: kcm_formats
Assignee: plasma-b...@kde.org
Reporter: a...@cryptomilk.org
CC: hanyo...@protonmail.com
Target Milestone: ---
This is a followup to https://bugs.kde.org/show_bug.cgi?id=403580 which doesn't
seem to be fixed.
SUMMARY
I'm German but want my workstation to be English with ISO8601 dates. To achieve
that I use:
export LANG="en_US.UTF-8"
export LC_ADDRESS="de_DE.UTF-8"
export LC_COLLATE="C.UTF-8"
export LC_CTYPE="de_DE.UTF-8"
export LC_IDENTIFICATION="C.UTF-8"
export LC_MEASUREMENT="de_DE.UTF-8"
export LC_MESSAGES="C.UTF-8"
export LC_MONETARY="de_DE.UTF-8"
export LC_NAME="en_DK.UTF-8"
export LC_NUMERIC="de_DE.UTF-8"
export LC_PAPER="de_DE.UTF-8"
export LC_TELEPHONE="de_DE.UTF-8"
export LC_TIME="en_DK.UTF-8"
The en_DK locale has d_fmt set to ISO8601 date (install glibc locale soruces).
grep d_fmt /usr/share/i18n/locales/en_DK
d_fmt "%Y-%m-%d"
However, if you set en_DK for LC_TIME in ~/.config/plasma-localerc you get a
completely different time format in KDE/Plasma. If you scroll through the list
in system settings look for an ISO8601 date, you find en_SE. If you set it the
plasma the time/date is ISO8601, however the rest of your system stops working.
The locale doesn't really exist in the system:
lsd -l /usr/share/i18n/locales/en_SE
lsd: /usr/share/i18n/locales/en_SE: No such file or directory (os error 2).
With LC_TIME=en_SE set in plasma-localerc, a lot of application stop working.
Here is an example:
Jul 19 19:22:42 magrathea solaar[4725]: Traceback (most recent call last):
Jul 19 19:22:42 magrathea solaar[4725]: File "/usr/bin/solaar", line 53, in
<module>
Jul 19 19:22:42 magrathea solaar[4725]: import solaar.gtk
Jul 19 19:22:42 magrathea solaar[4725]: File
"/usr/lib/python3.13/site-packages/solaar/gtk.py", line 34, in <module>
Jul 19 19:22:42 magrathea solaar[4725]: from solaar import cli
Jul 19 19:22:42 magrathea solaar[4725]: File
"/usr/lib/python3.13/site-packages/solaar/cli/__init__.py", line 25, in
<module>
Jul 19 19:22:42 magrathea solaar[4725]: from logitech_receiver import base
Jul 19 19:22:42 magrathea solaar[4725]: File
"/usr/lib/python3.13/site-packages/logitech_receiver/base.py", line 34, in
<module>
Jul 19 19:22:42 magrathea solaar[4725]: from . import base_usb
Jul 19 19:22:42 magrathea solaar[4725]: File
"/usr/lib/python3.13/site-packages/logitech_receiver/base_usb.py", line 30, in
<module>
Jul 19 19:22:42 magrathea solaar[4725]: from solaar.i18n import _
Jul 19 19:22:42 magrathea solaar[4725]: File
"/usr/lib/python3.13/site-packages/solaar/i18n.py", line 62, in <module>
Jul 19 19:22:42 magrathea solaar[4725]: set_locale_to_system_default()
Jul 19 19:22:42 magrathea solaar[4725]: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
Jul 19 19:22:42 magrathea solaar[4725]: File
"/usr/lib/python3.13/site-packages/solaar/i18n.py", line 49, in
set_locale_to_system_default
Jul 19 19:22:42 magrathea solaar[4725]: locale.setlocale(locale.LC_ALL, "")
Jul 19 19:22:42 magrathea solaar[4725]: ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
Jul 19 19:22:42 magrathea solaar[4725]: File
"/usr/lib64/python3.13/locale.py", line 615, in setlocale
Jul 19 19:22:42 magrathea solaar[4725]: return _setlocale(category, locale)
Jul 19 19:22:42 magrathea solaar[4725]: locale.Error: unsupported locale
setting
Jul 19 19:22:42 magrathea systemd[4015]: app-solaar@autostart.service: Main
process exited, code=exited, status=1/FAILURE
░░ Subject: Unit process exited
locale.setlocale(locale.LC_ALL, "") fails because there is no LC_TIME=en_SE
locale!
Reprocuder:
LC_TIME=en_SE.UTF-8 python3
Python 3.13.5 (main, Jun 11 2025, 22:06:31) [GCC] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import locale
>>> locale.setlocale(locale.LC_ALL, "")
Traceback (most recent call last):
File "<python-input-1>", line 1, in <module>
locale.setlocale(locale.LC_ALL, "")
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
File "/usr/lib64/python3.13/locale.py", line 615, in setlocale
return _setlocale(category, locale)
locale.Error: unsupported locale setting
LC_TIME=en_DK.UTF-8 python3
Python 3.13.5 (main, Jun 11 2025, 22:06:31) [GCC] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import locale
>>> locale.setlocale(locale.LC_ALL, "")
'LC_CTYPE=de_DE.UTF-8;LC_NUMERIC=de_DE.UTF-8;LC_TIME=en_DK.UTF-8;LC_COLLATE=C.UTF-8;LC_MONETARY=de_DE.UTF-8;LC_MESSAGES=C.UTF-8;LC_PAPER=de_DE.UTF-8;LC_NAME=en_DK.UTF-8;LC_ADDRESS=de_DE.UTF-8;LC_TELEPHONE=de_DE.UTF-8;LC_MEASUREMENT=de_DE.UTF-8;LC_IDENTIFICATION=C.UTF-8'
Where are those locales coming from?
Why doesn't the KDE en_DK match the en_DK in glibc?
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: openSUSE Tumbleweed
KDE Plasma Version: plasma6-desktop-6.4.2-1.1.x86_64
KDE Frameworks Version: libKF6ConfigCore6-6.16.0-1.1.x86_64
Qt Version: qt6-core-devel-6.9.1-2.1.x86_64
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