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 think it’s fairly parochial, and sounds quite infantile to me. Growing up (uk) we just used clockwise to tighten.
It doesn’t even bloody work, lefty tighty righty loosy is every bit as valid if the spanner is at the bottom.