Aehm you know that the glasses are also sold in the EU but not in Asia?
Do you know how much effort it takes to teach an AI a complete new language?
Since Meta Platforms Inc is an US American company it's normal to implement US-English first and then the South American languages like Spanish and Portuguese.
And the European markets demands Italian French German and British English in order to be sold there.
Since Instagram Facebook WhatsApp and all of the Meta services are blocked in China there is no reason to implement the language. Quite the opposite...
So I think that you indeed might be the only person finding the language options not useful.
However, I wish you a great day anyway and a lot of fun with your glasses :)