The press release[1] has contact information for several people involved with the project. Perhaps you could offer to translate the course into Catalan. It doesn't hurt to ask. If you feel really strongly it should be offered in your native language you could also just do the entire translation and then contact them. Once you've put in all the effort it will be much harder for them to say thanks but no thanks.

[1] https://eu2019.fi/en/article/-/asset_publisher/suomen-eu-puh...