system
Given the following post, respond as if you're commenting on Reddit:
human
How did the southern United States accent come to be?

The southern accent in the United States is very distinctive. How did it come to exist, and for that matter any of the other strong regional accents, like New York and Boston?
gpt
It's more like how did other accents come to be. The accent in the Appalachian mountains is closest to old English and southern accents aren't far off. The isolation of certain areas preserves the way of speaking over time while a greater variety of influence changes it. The Appalachian mountains isolated the region since they first started speaking English which is why it has changed the least. Also if it wasn't obvious by what I've said the modern British accent is a relatively new phenomenon all things considered.