There are various dialects in the United States. One of them is called Black English or African_American Vernacular English (AAVE).
From Wikipedia:
African-American Vernacular English (AAVE, /ˈɑːveɪ, ˈæv/[1]), known less precisely as Black Vernacular, Black English Vernacular (BEV), Black Vernacular English (BVE) or colloquially Ebonics (a controversial term),[2] is the variety (dialect, ethnolect and sociolect) of English natively spoken, particularly in urban communities, by most working- and middle-class African Americans and some Black Canadians.[3]
Having its own unique grammatical, vocabulary and accent features, African-American Vernacular English is employed by middle-class African Americans as the more informal and casual end of a sociolinguistic continuum; on the formal end of this continuum, middle-class African-Americans switch to more standard English grammar and vocabulary, usually while retaining elements of the nonstandard accent.[4][5]
As with most African-American English, African-American Vernacular English shares a large portion of its grammar and phonology with the rural dialects of the Southern United States,[6] and especially older Southern American English,[7] due to historical connections to the region.
source -
https://en.wikipedia.org/wiki/African-American_Vernacular_English