The French word for apple is pomme.
The German word for apple is Apfel.
The French word for Germany is Allemagne.
The German word for Germany is Deutschland.
Asking why all languages don't call Germany "Deutschland" is the same as asking why all languages don't call apples "Apfel".
Even within the same language, pronunciation changes by regional accent. Which region has the correct accent and which regions are kids taught to pronounce things incorrectly? Languages also change over time. The grammatical rules of English now aren't the same as they were 100 years ago. Is English more correct now or less correct?
Language is more like music than it is math.
They are grabbing people off the street and sending them to a megaprison in El Salvador without charge or trial. One man they took was told to be returned by a US court and the government refused saying that the uncharged, untried man is a criminal who deserves it and nobody who gets sent there will ever return. How is this not quite literally what happened with Germany sending Jewish people to a megaprison in Poland without charge or trial never to return?