Whilst.
My entire fucking life, the only time I ever heard or read the word "whilst", it was some posh limey in a movie or book. Then suddenly about ten years ago, I started seeing it everywhere by obviously not Br'ish people.
I hate that word. Anytime I see it, I assume the person writing it (no one ever says it) is using it to sound smarter. Meanwhile in real life, they probably speak English like they're chewing it.
Oh, and using "payed" instead of "paid". Fuck off.
And it's "by accident", not "on accident".