Yeah the concept would work for any language, basically! From game design perspective it's a big puzzle, instead of clues you then sprinkle around the vocabulary.
But this idea of a linguistic dungeon is why I got into RPG design, I will continue work on this concept! Toki Pona is a nice one to work with, since the vocabulary is both small and initially unintuitive.
I think there's room for improvement in the layout, there's a cool idea in there, but somehow it could be better supported.

