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.
Apple: User - you are holding it wrong!
The spanner is always at 12 o’clock. Either turn yourself or the spanner or your point of view to make it so and then the rule holds. The last option require imagination.
Take the piss after you have tried to thread a nut on a bolt that you cannot see and tightening it is towards you, at an angle. The nut has to cross a hack sawed thread and will try to cross thread 75% of the time unless the moon is in Venus.
Have a chat with some plumbers, builders, chippies, sparkys or engineers - assuming you are not one already. I think “leftie loosey …” is well known in the UK.