Yangjiang dialect has many third and fourth tones. So it sounds sharp. Harsh. I know a few people from other places who can speak Yangjiang dialect, no different from the locals. I asked them why they spoke so well, because their families didn't speak Mandarin or Mandarin with them. So they have to teach themselves if they want to chat. Yangjiang dialect is a kind of ancient Chinese, in which there are many words. Vocabulary and grammar are 99% similar to Cantonese. The difference is the tone. Unless you major in literature and history, you'd better not study it. The international definition of language distinction is that what others say is language if you don't understand it at all. Unless you are a Cantonese, not a Cantonese, you are not learning a dialect, but learning a language. Note: Cantonese is an independent language like Chinese internationally, with a population of 300 million.