the only thing really necessary would be setting the language to the entire… sublemmy (??) so all the posts there would default to the sub language. I think it’s pretty unusual for a sub to have posts in multiple languages, but at that point the big majority of it would be set.
sooo… they’re charging 30$ to fix their own game?
it’s definitely outside of your scope, but since when I discovered boardgaming (specifically german boardgames - which are actually not made in germany, it’s just the name of the genre) I got severely hooked into that. these are mainly no-luck deterministic games where you compete with your opponents through strategy and tactics. my favourites are Imperial Steam and Caylus, but you can also start from Terraforming Mars for a more easier rules overhead :)