Comment 3 for bug 1334675

I have a similar issue when choosing UK English as locale and Belgium as country:
locale: Cannot set LC_ALL to default locale: No such file or directory
LANG=en_GB.UTF-8
LANGUAGE=en_GB:en
LC_CTYPE="en_GB.UTF-8"
LC_NUMERIC=de_BE.UTF-8
LC_TIME=de_BE.UTF-8
LC_COLLATE="en_GB.UTF-8"
LC_MONETARY=de_BE.UTF-8
LC_MESSAGES="en_GB.UTF-8"
LC_PAPER=de_BE.UTF-8
LC_NAME=de_BE.UTF-8
LC_ADDRESS=de_BE.UTF-8
LC_TELEPHONE=de_BE.UTF-8
LC_MEASUREMENT=de_BE.UTF-8
LC_IDENTIFICATION=de_BE.UTF-8
LC_ALL=

Harald Sitter, I did what you suggested, and got this:

: # kreadconfig --file kdeglobals --group Locale --key Language
Sorry, command-not-found has crashed! Please file a bug report at:
https://bugs.launchpad.net/command-not-found/+filebug
Please include the following information with the report:

command-not-found version: 0.2.44

: # kreadconfig --file kdeglobals --group Locale --key Country
Sorry, command-not-found has crashed! Please file a bug report at:
https://bugs.launchpad.net/command-not-found/+filebug
Please include the following information with the report:

command-not-found version: 0.2.44

: # kdebudialog
Sorry, command-not-found has crashed! Please file a bug report at:
https://bugs.launchpad.net/command-not-found/+filebug
Please include the following information with the report:

command-not-found version: 0.2.44