“When instruction is stripped of children’s cultural legacies, then they are forced to believe that the world and all the good things in it were created by others. This leaves students further alienated from the school and its instructional goals, and more likely to view themselves as inadequate.” (p 41)
“For the people and communities who claim endangered languages, however, the issues go far deeper. References to a ‘vanishing fund of human knowledge’, linguistic anthropologist Paul Kroskrity point out, elide ‘key connections to the larger role of threatened languages in the sociocultural lives of their speakers’, including the fight for sovereignty and the places of origin and identifications associated with the language (Kroskrity, 2011: 180).” (p xix)
Endonyms are the terms used by people within their own communities. Exonyms are the terms (in this case, English-language) used by outsiders to those communities. Using exonyms are much like calling someone “Susie” when they prefer to be called “Susan”  — using endonyms is a step toward showing respect for the identities of community members.