It was a Native American tradition not to speak of the dead.
When reading Blood Meridian I am reminded of this reference to Native American traditions:
“among the Indians there have been no written laws. Customs handed down from generation to generation have been the only laws to guide them. Every one might act different from what was considered right did he choose to do so, but such acts would bring upon him the censure of the Nation.... This fear of the Nation's censure acted as a mighty band, binding all in one social, honorable compact.”
- George Copway (Kah-ge-ga-bowh) Ojibwa Chief (1818-1863)
Also, I am also reminded of this quote:
"How smooth must be the language of the whites, when they can make right look like wrong, and wrong like right."
- Black Hawk, Sauk (1767-1838) Ma-ka-tai-me-she-kia-kiak