USA HISTORY

Detailed explanation-1: -Plains Indian Sign Language, PISL, developed as a way for Native Americans of different tribes to communicate with each other across the barrier of different languages.

Detailed explanation-2: -Plains Indian Sign Language (PISL), also known as Hand Talk, Plains Sign Talk, and First Nation Sign Language, is a trade language, formerly trade pidgin, that was once the lingua franca across what is now central Canada, the central and western United States and northern Mexico, used among the various Plains Nations.

Detailed explanation-3: -Answer: Gestures and body language were used as an early form of communication. With an increase in contact, some traders, trappers, and Native Americans evolved into translators as they learned the language of one another.

Detailed explanation-4: -The most widely used variety of Native American sign language is known as Plains Indian Sign Language (PISL). Historically, PISL was used among numerous American Indian communities of the Great Plains.

Detailed explanation-5: -Thus the speakers of Algonquian languages included the Blackfoot, Arapaho, Atsina, Plains Cree, and Saulteaux (Plains Ojibwa), all in the northern Plains, while Cheyenne, also an Algonquian language, was spoken in the central Plains.