Margaret "Peggy" Speas is a linguist who works on syntax, specifically evidentiality and Navajo. She is a Professor of Linguistics at the University of Massachusetts Amherst. Speas received her PhD in Linguistics from the Massachusetts Institute of Technology in 1986.[1] Speas's work focuses on differences between elicitation, documentation and linguistic data analysis on North American Native Languages.[2] She also works with preservation of Navajo and is a founding member of the Navajo Language Academy.[3]