"Know to speak" vs. "Know how to speak" [closed]

I know to speak English. I know how to speak English.

What is the difference between the sentences above?


I know how to speak English.

means that I have the knowledge and capability of speaking English.

I know to speak English.

means that I am aware that I should speak English. For example:

Don't speak another language or they will know we are foreign.

Don't worry, I know to speak English.