Sent_en: 2zh The Comanche were dubbed code talkers because the American Indian language has no written record, and it was never broken by the Germans during the war.
Sent_yy: 科曼奇之所以被称为“密码通讯员”，是因为这种美洲印第安语并没有书面记录，而且在战争期间德国人也从未破译过它。