In preparation for writing Book 3 of the H.A.L.F. series, I've been studying language creation (ConLang). It is at times a very dry topic. I'm not sure how much time I want to devote to learning linguistics in furtherance of world building.
I think the Star Wars universe is a good example of going just far enough with language creation to make it sound plausible without necessarily going full throttle.
While Yoda doesn't speak a different language, it is one of the more fun uses of language in the Star Wars world. Now thanks to the folks at Grammarly, you can "Yodify" your own words.