The Germans don’t call their country Germany. They call it Deutchland.
The Japanese don’t call their country Japan. They called it Nippon, and now Nihon.
So where do these names we have for other countries come from, and why do we use them? Don’t the citizens of a country basically determine what their country is called? If the Germans call it Deutchland, why do we persist in calling it Germany? Germany isn’t a translation of Deutchland, because Deutche doesn’t really mean “Germans”, it means what it says. They call themselves the Deutche, so that’s what they are, right?
And at the UN, do the placards with the countries names use their proper name, what the people of that country call it, or do they use Anglicized names and these other basically made-up names we have?