Hawaii Sign Language (HSL) is a language used by approximately 40 individuals in the Hawaiian Islands. All of the known users are older and primarily use American Sign Language (ASL), making HSL a critically endangered language. HSL is neither a dialect of ASL nor a signed version of Hawaiian Creole English, “Pidgin.” It is in fact so distinct from ASL that it is most likely a completely unrelated language. Although other names have been suggested for HSL, the demographic of its users and its distinctness from other languages led to the choice of Hawaii Sign Language to refer to this sign language.