I cant speak English.我不会讲英文.

例句：

I cant speak English well, I dont know why?

我说不好英语，我不知道这是为什么？

I cant speak English, to say nothing of French.

我不会说英语，更别提法语了。

That's right. That's why I can't speak English yet.

你说得对。难怪我还不会说英语。

I can't speak English as fast as a native speaker.

我说英文以英语为母语的人说得快。

Hello! I can't speak English very well, could you lead me to luggage-taking?

你好！我不会说英语，您能否带我到行李提取处？

I can't even speak english, let alone french.

我的英语就不行了，更没提法语。