Is It Misspelled or Misspelt?

The past tense of misspell is misspelled in American English. However, in other varieties of English, misspelt is also acceptable.

Is it misspelled or misspelt UK?

Brits Will Accept "Misspelled" or "Misspelt"

In the UK, both "misspelled" and "misspelt" are accepted.

Is misspelt hyphenated?

“Misspelt” is not a misspelled word, but I've seen a few other versions of this word that are somewhat lacking in… well… spelling. ... Some want to throw in a hyphen (mis-spell); some avoid the double 's' (mispell); I've even seen it with an extra 'p' surely for pizzazz (missppell).