A little lore about languages and a little sketch
This is not an entirely original solution to the language barrier. I took the idea of an Allspeak(?) from Marvel and shoved it into the Irminsul. Why does it also work out of Teyvat? Well, it's for me to know and you to find out))
Izuku and his friends + a few other 1A students decided to drop by one of the TA students' lessons. Mr. Albedo kindly agreed. The man was lecturing as usual when…
Ochako: um… Mr. Albedo, what language do you write in?
Albedo: Hmm? *looks from the blackboard to the students* Oh, my apologies. This is the Teyvat-written, a language designed specifically for all Teyvat peoples to understand. If you focus a little bit, you can understand it too. Try. *The teacher's eyes sparkle with research interest*
Momo: I am… I can really understand what's written there now?!
Izuku: That's amazing! How does it work? Is this some kind of quirk?
Hu Tao under her breath: Yeah, a quirk.
Albedo: Teyvat-written and Teyvat-spoken were created by the Goddess of Wisdom herself at the end of the Archons War and inscribed in the Irminsul. Thanks to this, any written or spoken word can be translated and understood by another intelligent being, even if they themselves do not know Teyvat language. This is convenient, but not ideal, so it is recommended to use your native language rather than Teyvat for any cultural and official matters.
Tsuyu: Do you have more than one language, kero? I hadn't thought about it before.
Mualani: Of course there is! Modern languages for each region, their ancient versions, different dialects, languages of other species, and extinct ones!
Collei: Madame Faruzan likes to say that the laziness of young people kills Darshan Haravatat, and Teyvat-ish makes it meaningless. It makes her very angry.
UA: (Darshan Haravatat?)
Ayaka: *thoughtfully* I've heard that you need to learn 20 languages to get there.
UA: HOW MUCH?!
Collei: *embarrassed* Actually, that's not the case anymore.
Ayaka: Doesn't Mr. Alhaitham know 20 languages?
Collei: 23. And, as Master told me, he just took the joke seriously.
UA: (Why the hell are they forced to learn so many languages??!)
