If anything I’d say Heaven’s Vault is the better of the two!

Sure, it’s way less polished and can be janky, but the language and the translation mechanics are so much deeper and more well-developed than anything in Chants of Sennaar.

The languages in Chants are tightly defined and very specific to what the game needed, so they’re not really usable outside of that context. But the language in HV is rich and complex, and you can actually learn to write new things in it.