Eye dialect

Eye dialect is the use of nonstandard spelling for speech to draw attention to an ironically standard pronunciation. The term was coined by George P. Krapp to refer to the literary technique of using nonstandard spelling that implies a pronunciation of the given word that is actually standard, such as wimmin for women; the spelling indicates that the character's speech overall is dialectal, foreign, or uneducated. This form of nonstandard spelling differs from others in that a difference in spelling does not indicate a difference in pronunciation of a word. That is, it is dialect to the eye rather than to the ear. It suggests that a character "would use a vulgar pronunciation if there were one" and "is at the level of ignorance where one misspells in this fashion, hence mispronounces as well."

The term is less commonly also used to refer to pronunciation spellings, that is, spellings of words that indicate that they are pronounced in a nonstandard way. For example, an author might write dat as an attempt at accurate transcription of a nonstandard pronunciation of that. The rest of this article will discuss the former definition.

Some notable authors who use eye dialect include (in alphabetical order): Harriet Beecher Stowe, Charles Dickens,William Faulkner, Greer Gilman, Alex Haley, Joel Chandler Harris, Russell Hoban, Terry Pratchett, James Whitcomb Riley, Robert Ruark,John Steinbeck and Mark Twain. However, most authors are likely to use eye dialect with restraint, sprinkling nonstandard misspelling here and there to serve as a cue to the reader about all of a character's speech, rather than as an accurate phonetic representation.

While mostly used in dialogue, eye dialect may appear in the narrative depiction of altered spelling made by a character (such as in a letter or diary entry), generally used to more overtly depict characters who are poorly educated or semi-literate.

...
Wikipedia