Sign language is one of the oldest means of communication for the deaf and dumb , which appeared in Spain in the seventeenth century to deal with those who do not have the ability to speak or hear. It is considered one of the languages ​​in which the language of the hands is used with specific signs, and the signs are according to each letter of the alphabet , and through them it is possible to form sentences. Sign language is not limited to the movement of the hands, it includes facial expressions , the movement of the lips and expressions with the movement of the body.