ナバホ語
Peggy Speas has been heavily involved with the preservation of North American Native Languages, with focus on Navajo. She is a founding member of the Navajo Language Academy, where she has served as president for two years. Founded in 1997, the Academy is a nonprofit organization which promotes the study and preservation of Navajo. In the end of 1999, she finished her term as an associate editor on the journal, "Language". Speas is a co-author on the book "Diné Bizaad Bináhoo'aah": Rediscovering the Navajo Language, which is now used as the official state textbook for the Navajo language in New Mexico. In 2011, she was recognized as a Spotlight Scholar for her over 20 years of work in preserving North American Native Languages.