Using translations is perfectly fine. If you need anything you can't properly translate, the website currently has a newly active forum topic where
the community generates the translation so you don't have to. You can find that here: https://rivalrebels.com/en/boards/topic/10/community-generated-translations
By the way, welcome to the official Rival Rebels forum. Welcome, if you need help with anything simply ask.
Have a good day! :)