I'm on finishing state of translation of this DLC to russian, and wanted to ask if there are some rules that i may accidentally break?

As for now i'm:
Doing my own translation - fully my work without any looking on existing translations (officially relesed base game, fan-translation of expansion [there weren't any official relese of expansion in russian] - i just know that they exist, but didn't checked them to make my work more original).
Didn't changed any models - so it won't load and show anything to people who not owning DLC - only changed textures inserting russian text