Commonly misspelled English words is a very common error; the following words from the list are all good English words, though often incorrectly used in place of their homophones: Spell checkers do not detect incorrect use of homophones. Personal names and surnames may be pronounced like a standard English word, but with different spelling: "balance" and "John Ballance"; "war" and "Evelyn Waugh"; "marshal" and "George Marshall". Personal names do, of course, generally start with a capital letter. A misspelling in English might be made by someone used to a different spelling in another language; for example, "address" is translated "adresse" in French and German.
Longest word in English Sylvia Plath made mention of it in her semi-autobiographical novel "The Bell Jar", when the protagonist was reading "Finnegans Wake". "Supercalifragilisticexpialidocious", the 34-letter title of a song from the movie "Mary Poppins", does appear in several dictionaries, but only as a proper noun defined in reference to the song title. The attributed meaning is "a word that you say when you don't know what to say." The idea and invention of the word is credited to songwriters Robert and Richard Sherman. The English language permits the legitimate extension of existing words to serve new purposes by the addition of prefixes