Alternate Names: Plains Sign Language
Dialects: Some variation by ethnic group and region, but dialect differences do not impede communication among different tribes. Comparisons between different historical sources of lexical data on PISL range from 80% to 92%. Comparison of these sources with American Sign Language , show 50% similarity.
Genealogy:
Demographics: Mostly elderly hearing people and some middle-aged or older deaf people. 0 monolinguals.
Language Use: Second language only.
Typology: SOV; compounding (head-initial); verb agreement; classifier predicates.
Nation of Origin: United States