Words everybody uses but we dont

Its pretty weird; there are words everybody uses, but my familly and i dont 🤔

For example: cool, mega, vet, chill etc.

If i cant use the words mega and super in Dutch or English i think i cant speak!!!! 😵‍💫😵‍💫😵‍💫

And also crinch 🤷‍♀️

@Fleurke right..... .

What about weird?

In my case, that's quite contrary. I have a long list of archaic words "no body uses but me" such as forthwith, thither, heretofore, athwart etc etc.