Edit: looks like Kratos beat me to it but I'll leave my list up anyway in case someone else needs the walkthrough for looking things up yourself!
Hi! You can find all these names in your local game files. Locate the game files on your computer and navigate to Content > Texts > Russian, and open that .xml file, e.g. in Notepad or similar. Then ctrl+H to search, and look up every creature by its English name to find the translations used in-game. Or rather, look up just one as in this case they're conveniently listed all in the same place!
Explanation just for future reference; I'll paste a cleaned-up list of the non-human creature names below!
Charybdis: Харибда
Coelanth: Целанф
Crawler: Ползун
Endworm: Червь Рока
Doomworm: Гибельный червь
Fractal Guardian: Фрактальный страж
Husk: Хаск
Mudraptor: Грязевой раптор
Deathraptor: Раптор-убийца
Mantis: Богомол
Moloch: Молох
Moloch Boss: Молох-босс
Tigerthresher: ...
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