The hopi didn't have a written language. Their prophecies were an oral tradition which is somewhat recently (1963) documented as a written work: https://www.ama

The hopi didn't have a written language. Their prophecies were an oral tradition which is somewhat recently (1963) documented as a written work: https://www.amazon.com/Book-Hopi-Frank-Waters/dp/0140045279 https://www.amazon.com/Book-Hopi-Frank-Waters/dp/0140045279