I'm going to leave a link below to a website called "Pronunciation Studio," where you can find the most common pronunciation challenges for people whose native language is Japanese, Italian, Spanish, Thai, Portuguese, Polish, and many others.
我會在網站下方留下一個連結,叫做「發音工作坊」你可以找到最常見的發音問題,針對母語為日語,義大利語,西班牙語,泰語,葡萄牙語,波蘭語等等的人,