to exchange · exchange · communication · interaction · to have social contact (with sb)

People should get more involved.

Gestures are very important in human communication.

My mother speaks French better than my father speaks English, so they usually speak to each other in French.

There is absolutely no reason that you should even attempt to speak with the Chinese girls, or at least these ones. They're so rude!

If you want to learn Chinese well, you should communicate with Chinese people more often.