[perl4ever]

Picture some American saying there's no point in knowing languages other than English because 99.99% of the people you will encounter know it.

https://en.wikipedia.org/wiki/British_Standard_Whitworth

[oblio]

Thankfully we're slowly getting rid of that abomination and replacing it with something reasonable:

https://en.wikipedia.org/wiki/ISO_metric_screw_thread

A classic: https://www.youtube.com/watch?v=pikrntjcbyw