Southern American English or Southern U.S. English is a regional dialect or collection of dialects of American English spoken throughout the Southern United States, though concentrated increasingly in more rural areas, and spoken primarily by White Southerners. In terms of accent, its most innovative forms include southern varieties of Appalachian English and certain varieties of Texan English. Popularly known in the United States as a Southern accent or simply Southern, Southern American English now comprises the largest American regional accent group by number of speakers. Formal, much more recent terms within American linguistics include Southern White Vernacular English and Rural White Southern English.