Plains Indian Sign Language

Plains Indian Sign Language (PISL), also known as Hand Talk, Plains Sign Talk, Plains Sign Language, or First Nation Sign Language, is an endangered sign language common to the majority of Indigenous nations of North America, notably those of the Great Plains, Northeast Woodlands, and the Great Basin. It was, and continues to be, used across what is now central Canada, the central and western United States and northern Mexico.

Source: Wikipedia — Plains Indian Sign Language (CC BY-SA 4.0)