I did not even know the language of these people.

How else would you know the language of my people?

Only then do you really get to know the language.

But you do not know the language they're written in.

And then you can't always tell because about half of them know the English language.

He didn't even know the language well enough to read it.

"Would you mind telling me how I now know your language?"

To make contact, you have to know the local language.

Not knowing their language, he brought the group to the general.

The two were in communication and Michael knew the language.