

I know that one is (was) 100k people, and the other is (still) 23mln people, but this has the “Artsakh has never been part of independent Azerbaijan” vibes.
“The world” doesn’t care for such arguments, only for who is tastier when killed and meat shared.
Wha-ha-ha? If you mean their archaic dead Chinese variant that was mostly used for poetry and feudal prestigious stuff, it may not be a good comparison to mandarin as the main language. Actually many of the kanji pronunciations are how it would sound, or even whole phrases. I speak neither of the three (third being Japanese), just repeating what my sister would say (she studied lost of languages).
I think the situation is similar to Japan, except much of their vocabulary is Chinese in origin. But, ahem, the variant is too a very specific dead idiom.
But not in what you say. Their argument is flawed in the sense that one country is somehow obligated to all be under one state.
(Has a bit of reminiscence with Kremlin goblins thinking that every Russian-speaking area is their slaves and belongs to them.)