What would you think of adding GDscript to the courses? I know it has some similarities with Python, but I am fairly certain it could be a nice addition to the course list!
Without the corresponding game engine one couldn't do much with Godot script. I don't know how they would integrate such a game engine on sololearn. Still, if you want to suggest something, better address sololearn directly via the in-app feedback function or mail. (They don't read Q&A)