Spoilers: i made a cheat sheet for some of the game to track terms, i didn't finish tho, i played up until Rani Merbin. Don't expect to finish the whole game using this sheet. (this is a really fun puzzle game translating is fun)
i was also stuck on merbin! i know von is related to quivon and gevon, but how? also, buponan = bu + pon + an, so maybe an modifies pon to be horizontal. it feels like pon means right, and von means left, but idk. other than that, this is basically what i wrote down too!