Actually, it's formally called African American Vernacular English, and it includes a few useful features that the English language doesn't otherwise have.  https://en.m.wikipedia.org/wiki/African_American_Vernacular_English#Overview For example, a phrase like "he be working" can mean that a person is either at work right now, or that they are busy because they spend so much time at work - even if they are not working at the exact moment. In cases like this, it doesn't matter if the person is at work, because the point is that the person is busy during non-work hours as well. This is a "habitual" tense, as some have called it, and is a feature of some other modern languages.  Also, AAVE omits words that do not add any meaning to the sentence, making it more efficient. The differences in pronunciation are actually quite consistent, and reduce the huge variety of pronunciations that English uses.  Finally, one of my favorite features, it removes the double and triple negatives that English has (and which many other languages don't have). A line like "He ain't got no money" means that he's broke in both AAVE and in Spanish, but in standard English it would mean that the person does have money. In AAVE, the repeated negatives add emphasis, rather than negation. English is the unusual language in this regard, as most use repeated negatives for emphasis.