what is human in sign language
Language is a human system of communication that uses arbitrary signals, such as voice sounds, gestures, and/or written symbols. The study of language is called linguistics. Linguists (that is, specialists in the study of language) have defined language in many different ways.
For other uses, see Body language (disambiguation). Body language is a language where is not necessary words to express feelings by physical behaviors, such as facial expressions, body posture, gestures, eye movement, touch and the use of space. Body language exists in both animals and humans, but this article focuses on interpretations of human body language.