[Localization] How to get a test locale like kde's x-test loaded by Qt

[Burkhard Lück]

Hi Qt translators,

KDE has an internal locale called "x-test" described in the section "The x-
test language" on https://techbase.kde.org/Development/Tools

The translations for x-test are automatically generated on the KDE l10n server 
each day, by adding trailing and leading "xx" to the source strings.

This locale is very useful to find untranslatable strings in the GUI at runtime 
and helps even to find problems with fixed layout, because the x-test strings 
are longer than the en source strings.

x-test is an internal locale in KDE, unknown to Qt and therefore Qt will 
simply refuse to load a catalog from locale x-test.

Nevertheless I made x-test workable locally for me using this recipe 
http://lists.kde.org/?l=kde-i18n-doc&m=141329246521890&w=2

But that is just an ugly hack to ensure it works and it is nor fair to misuse 
locale zu/Zulu for this purpose.

Is there any equivalent to the KDE locale x-test already in Qt and I did not 
find it or how to get catalogs from locale named x-test loaded by Qt?

Thanks in advance

-- 
Burkhard Lück