✔ 最佳答案
There are a few ways to say this...
1. Sorry, I don't speak English.
2. Sorry, I can't speak English.
3. Sorry, I don't really understand English.
4. Sorry, I don't know how to speak English.
etc.
use sorry to let people feel that you are polite...
DO NOT use ' I'm not speaking English' like the one who above me said....
It's totally wrong in the meaning.... This means that you are now not speaking English... but it doesn't meant that you can't speak it....