[wareck]

I use DiskspanGUI, and I done this :
-go in ADDON diskspangu folder, unzip the special oodle library oo2core_7_win64.dll and oo2core_8_win64.dll in the oodle library folder root

-in the game folder, removed language I don"t use (only big .pak files)

Data1:
Name Data3.bin
xtool:mkraken:7:mmermaid:8:mreflate+srep_new:490g+ LOLZ_ULTRA => NOTICE
(only one file, it's just to let diskspangui to copy dll in xtool folder and use them for the next step)

Data2
Name Data1.bin
xtool:mkraken,t400:mreflate+srep_new:490g+LOLZ_NOR MAL =>*.pak

Data3
Name Data2.bin
xtool:mkraken:mreflate+srep_new:490g+LOLZ_NORMAL => all other files

Results is around 23GB

If you wants to keep languages for future update:
Data4
xtool:mkraken,t400:mzlib:mreflate:mpng:d1+srep_new :490g+LOLZ_NORMAL and add only files (ar.pak , de.pak ...) and do not forget to disable them in Data1.bin
You also can add task and several data to make installer with multiple choice
for language
Language pack is around 15.6GB compressed