Yes, I'll do what I can :)

I did what you said, I didn't find any export_descr_sounds_soldiers_voice.txt , I found: export_descr_sounds_soldier_voice.txt
Without the "s" of "soldiers" , I updated that one to the revision number 1274.
When I started the game, the following error message appeared:
Script error in eb/data/export_descr_unit.txt , at line 954, column 24, could not find soldier battle model for unit type 'yubtseb elephant gnitekram'.