The problem is that I can see only English NPC-Naming there. Can't find other languages mapping (I am only interested in changing the way they refer to each other, but not in English)There is just one mapping file.
Yes, all dialogues for all languages are embedded. Here is an example how it looks:
EN <Hello!>
FR <Bonjour!>
GER <Hallo!>
CN <Ni hao!>
EN <How are you?>
FR <merde, merde - no idea I do not speak French>
GER <Hey, du Dreckssau! Was geht ab?>
CN <Ni hao ma?>
Ofc you only see the dialogues according to your selected languages.