Language kcm leaves some programs in English and others in other languages

[Tim Edwards]

The System Settings->Locale->Country/Region & Language->Languages module is setting a wrong value for the LANGUAGE environment variable in ~/.kde/env/setlocale.sh which leaves some programs running in English and some in other languages.

To reproduce:
1. The System Settings->Locale->Country/Region & Language->Languages
2. Install a couple of different languages, in this example British English, American English, German and Spanish
3. Order Preferred Languages to (top to bottom): American English, British English, German, Spanish
4. Apply, ok, logout of KDE, log back in

Actual Results:
Some programs are in English (KDE/QT programs, Firefox, Libreoffice), while some are in German (GTK programs like GIMP, all bash command line programs, e.g. tim@localhost:~$ ls filenotthere
ls: Zugriff auf filenotthere nicht möglich: Datei oder Verzeichnis nicht gefunden)

cat ~/.kde/env/setlocale.sh
export LANG=en_GB.UTF-8
export LANGUAGE=en:de:es:en
export LC_NUMERIC=en_GB.UTF-8
export LC_TIME=en_GB.UTF-8
export LC_MONETARY=en_GB.UTF-8
export LC_PAPER=en_GB.UTF-8
export LC_IDENTIFICATION=en_GB.UTF-8
export LC_NAME=en_GB.UTF-8
export LC_ADDRESS=en_GB.UTF-8
export LC_TELEPHONE=en_GB.UTF-8
export LC_MEASUREMENT=en_GB.UTF-8

Expected Results:
All programs are in English as American English and British English have the highest preferences, and all software includes translations for at least American English

Workaround
Manually set export LANGUAGE=en in ~/.kde/env/setlocale.sh