Hi there,
because noone here want to answer, here what i know by now
First you have to copy all xml files in he different Modules in a sufolder of your language like the other preinstalled folders CNs and TR ( for me language=German Foldername I use: DE)
Second yo have to alter every header of those new files from:
<?xml version="1.0" encoding="utf-8"?>
<base xmlns

si="
http://www.w3.org/2001/XMLSchema-instance" xmlns

sd="
http://www.w3.org/2001/XMLSchema" type="string">
<tags>
<tag language="English" />
</tags>
to:
<?xml version="1.0" encoding="
utf-16"?>
<base xmlns

si="
http://www.w3.org/2001/XMLSchema-instance" xmlns

sd="
http://www.w3.org/2001/XMLSchema" type="string">
<tags>
<tag language="
German" />
</tags>
Third (and this is very important!) you have to edit the two Languages.xml so it contains a subsection regarding your used Language:
..\Mount & Blade II Bannerlord\GUI\Launcher\Fonts:
<!-- English -->
<Language id="English" DefaultFont="FiraSansExtraCondensed-Regular">
<Map From="FiraSansExtraCondensed-Regular" To="FiraSansExtraCondensed-Regular"/>
</Language>
<!--
German -->
<Language id="
German" DefaultFont="FiraSansExtraCondensed-Regular">
<Map From="FiraSansExtraCondensed-Regular" To="FiraSansExtraCondensed-Regular"/>
</Language>
and
..\Mount & Blade II Bannerlord\GUI\GauntletUI\Fonts:
<!-- English -->
<Language id="English" DefaultFont="Galahad">
<Map From="FiraSansExtraCondensed-Light" To="FiraSansExtraCondensed-Light"/>
<Map From="FiraSansExtraCondensed-Medium" To="FiraSansExtraCondensed-Medium"/>
<Map From="FiraSansExtraCondensed-Regular" To="FiraSansExtraCondensed-Regular"/>
<Map From="Galahad" To="Galahad"/>
<Map From="Galahad_Numbers_Bold" To="Galahad_Numbers_Bold"/>
</Language>
<!--
German -->
<Language id="
German" DefaultFont="Galahad">
<Map From="FiraSansExtraCondensed-Light" To="FiraSansExtraCondensed-Light"/>
<Map From="FiraSansExtraCondensed-Medium" To="FiraSansExtraCondensed-Medium"/>
<Map From="FiraSansExtraCondensed-Regular" To="FiraSansExtraCondensed-Regular"/>
<Map From="Galahad" To="Galahad"/>
<Map From="Galahad_Numbers_Bold" To="Galahad_Numbers_Bold"/>
</Language>
Now open the game and try to change your language to your desired entry. If the game frezzes and crashes you have done something wrong (have you edited thoose Languages.xml?), if it works you are on the right path to translation:
Here as prove that this works (just editet a few things until now):
steamcommunity.com
Have fun! or should I say Diviértete!
For all the other leechers here: Happy translating!
Für meine Ladsleute: Viel Spaß beim Übersetzen ins Deutsche. Und nicht vergessen, es muss Euer und Ihr lauten und nicht Dein, Du oder Sie
"Ihr betretet ein Gasthaus" und nicht "Du betrittst ein Gasthaus" oder "Sie betreten ein Gasthaus"
And yes, i know, I am a real Angel ?