The phrase "go foot," meaning to walk or travel on foot, is spelled using the standard English writing system. "Go" is spelled with the letter "g" followed by the letter "o," pronounced as /ɡoʊ/. "Foot" is spelled with the letters "f," "o," "o," and "t," pronounced as /fʊt/. Together, the phrase is pronounced as /ɡoʊ fʊt/. While this phrase may be slightly colloquial, its spelling follows the standard conventions of English orthography.