An important distinction though Kitten'… my vocal language is quite distinct from the use of standard English language.
Accent, regional and social classifications influence the manner we express ourselves. My written skills are quite distinctive from my verbal. Drop someone trained solely in standard English formats, and they can be easily lost in the normal flow of regional dialects.
There is a town near me which was center of sociological studies in the 60's due to the dialectic changes in the vocal expression. At it's core it was English… but the radical restructuring of the language in meaning of words, sentence structure… a unique language manifested. You can still go there, hear English spoken and have absolutely no clue what they are saying.