The world has a lot of different standards for a lot of things, but I have never heard of a place with the default screw thread direction being opposite.
So does each language have a fun mnemonic?
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I daresay that 99% of “English-speakers” never wasted a thought on why the Third Reich actually was the third.
And honestly, it could be that 90% wouldn’t know what the HRE was or who the Kaiser was once you told them. It’s just not a thing that usually comes up in everyday life.