Yerkish is a signed language. It has its own script. The Yerkish language is pretty limited due to its application and scope. Since it is used in scientific research, in primatology and also by computers,it is nice help, sort of, to have that Wiktionary available for scientists and interested public to look up Yerkish terms and expressions, and document them online. ISO codes for Yerkish (language and script) are requested. This process may take time.