So is Standard English also a dialect, then?
(English is "A language so widely distributed naturally has many varieties. These are known
as dialects.1 That word doesn’t apply just to rural or uneducated forms of speech;
the way we use it here, everyone speaks a dialect. And naturally, this book doesn’t
try to describe all the different dialects of English there are. It concentrates on one
central dialect that is particularly important: the one that we callStandard English.
http://assets.cambridge.org/97805218/48374/excerpt/9780521848374_excerpt.pdf