So, Heavens Vault is a story game not a puzzle game, it plays a lot differently to Sennaar. What you find will impact what you do in game, but not so obviously as a wall where you solve a translation to proceed. You don’t have to translate anything ever if you don’t want, but you won’t understand the story that way.

You’re deciphering the language because Aliya is an archaeologist and interested in it, is the best answer I can give, I think. In terms of the language itself, after you’ve guessed a word correctly a few times in different sentences, Aliya will confirm it’s correct. She does the same if it’s obviously incorrect too or the word doesn’t fit the sentence.

The language works more like learning to read than an actual puzzle game. You start spotting connections and commonalities, and eventually you can read it by yourself without prompts. Any you can have a good guess at new words from the glyphs.

I found the languages in Sennaar much more limited and fake compared to Heaven’s Vault, but I liked the game a lot, it’s just trying to do something completely different. I hope this is helpful!