British English shows a preference for retaining strong verb forms (burnt, learnt, spelt, dreamt, spoilt etc). American English shows a preference for ignora... I'm mean simplification (burned, learned etc).
Compare insure/ensure and inquiry/enquiry.
Kind of like a secret fraternity handshake.
A: "Oh god. You're one of those 'misspelt' dumbasses, aren't you? Shoo! The thumbs down button is up and to the right."
part. (past) having been spelt incorrectly.
This is a rarely used but often preferred (among the pretentious, eclectic, geeky, artsy, or British) spelling of "misspelled."