When we do not understand each other's language，we can talk with the help of body language.
A Frenchman was once traveling in England. He couldn't speak English at all. One day he went into a restaurant and sat down at a table. When the waiter came，he opened his mouth, put his fingers in it and took them out again. He wanted to say, "Bring me something to eat." The waiter soon brought him a cup of tea. The man moved his head from side to side. The waiter understood him and took the tea away. In a moment he came again with a cup of coffee and put it on the table. The man again refused his offer. He shook his head whenever the waiter brought him something to drink, because drinks are not food. When the man was going away, another man came in. This man saw the waiter, and he put his hands on his stomach. That was enough. In a few minutes there was a large plate of meat and vegetables on the table in front of him.
So you see, we can understand the language of signs as well as we can understand the language of words.
