I only speak a few words of Chinese.

我只能说几个汉语词。

A Do you speak Chinese?

A 你说汉语吗?

B I only speak a few words, unfortunately. I need to learn more.

B 遗憾的是,我只能说几个汉语词,我需要学习说得更多。

A Yes, its good to learn, but I know its difficult for you.

A 是的,学习非常有好处,但我了解对你非常难。

B Its difficult, but not impossible!

B 是非常难,但不是不可能的!!

Learning1 and speaking a language is difficult. There are a variety of ways of expressing this.

学习讲一门语言是非常难的。有不一样的办法可以表达这个思想。