Problem in loading QM translations with LANGUAGE="" envar

[Wolfgang Bauer]

Hi,

I noticed a similar problem here.
My LANG is set to "de_AT.UTF-8", and if LANGUAGE is not set, parts of KDE 
applications are untranslated (i.e. those frameworks translations that come 
from .qm files are missing).

Sure, setting LANGUAGE to "de" will fix that, but it's not necessarily set on 
other desktops, and even in Plasma it will not be set on a fresh user account 
(only if you explicitly configure the language in systemsettings5).
Also, the problem will also occur if LANGUAGE is set to "de_AT" or similar.

I investigated the issue and proposed a fix here though:
https://phabricator.kde.org/D9793

Note that if you'd want to try it, you'd need to recompile all affected 
frameworks with the patched extra-cmake-modules.

Kind Regards,
Wolfgang