Hi mate, I strongly recommend you to keep going and don't quit...cuz you'll feel the experience completely different and reading in English is much better. Language is subtle, trust me. You'll soon find out. Good luck with your reading!

为啥我认为stan是斯坦名字英文

個人認為Stan是除了有口音外，也有輕微的口吃和lisp（比如說不好th的音，thirteen說成firteen）。如果只是有方言口音的話直接寫一下他有濃重的esturary/cockney口音，讀者不用更多的解釋便能明白。
JKR用心良苦要在Stan的對話裡刻意模仿出牙齒漏風的發音，是想描述出一個開朗樂觀並不在意自己說話跟別人不一樣的Stan吧