International Sign Language (islbook.com)

 

International sign language (ISL) is not official sign language, although it is important in every country the sign language user knows.  It can be of more related information in Sign Language, and often referred as a communication system of two-hand and body movement that consists of "gesture", "mime", "body language", “facial expression” and “alphabet”, and that was made in their attempts. 

 

For example, each country have own different sign language and even alphabet, imagining how those sign language user communicate each other when they do not come from the same country.  It is how the method of communication they use akin to International Sign Language. 

 

In other words, multi-sign language is also identified as International Sign Language which consists of the official or unofficial sign language of each country it has.

 

ISLbook