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Deutschland Germany Allemagne Tyskland Vokietija Niemcy Nemecko Saksa...
(sh.itjust.works)
Source: Itchy Feet (https://www.itchyfeetcomic.com/2024/01/real-name.html)
That's stupid. Most countries have different names or at least spellings in other languages. Nothing wrong with that. The name they use in the countries primary language would sound weird in others and some even lack the characters to write it.
It usually isn't this bad with neighbouring countries though. The reason is the late unification of Germany of course.
I'm not sure late unification is necessarily the determing factor here. e.g. look at Italy
Sure, but Italy also has the Vatican in it, and I've heard that place had and continues to have quite a lot of influence... Also, Italy was unified one before, the same cannot be said about Germany. (No, the HRE does not count)