what is the origin of the southern accent
Southern American English Southern dialects originated in large part from a mix of immigrants from the British Isles, who moved to the American South in the 17th and 18th centuries, and the creole or post-creole speech of African slaves. Upheavals such as the Great Depression, the Dust Bowl and World War II caused mass migrations of those and other settlers throughout the United States.
Sociolinguistics A commonly studied source of variation is regional dialects. Dialectology studies variations in language based primarily on geographic distribution and their associated features. Sociolinguists concerned with grammatical and phonological features that correspond to regional areas are often called dialectologists.