FLAGSTAFF, Ariz. (AP) — The language he once was punished for speaking in school became Chester Nez’s primary weapon in World War II.Before hundreds of men from the Navajo Nation became Code Talkers, Nez and 28 others were recruited to develop a code based on the then-unwritten Navajo language. Locked in a room for 13 weeks, they came up with an initial glossary of more than 200 terms using Navajo words for red soil, war chief, braided hair and hummingbird, for example, and an alphabet.Nez never tired of telling the story to highlight his pride in having served his country and stress the importance of preserving the Navajo language. The 93-year-old died Wednesday morning of kidney failure with plenty of appearances still scheduled, said Judith Avila, who helped Nez publish his memoirs.