Like many other indigenous tribes, Navajo tribes also have their own language. During World War II, Navajos used their language as a code to communicate and helped the U.S. to win the Pacific War against Japan. 

However, nowadays, Navajo language has been designated as "vulnerable" by UNICEF. On the Navajo reservation, there are only 170,000 people who can still speak Navajo.

CGTN visits Tséhootsooí Diné Bi'Ólta' School, a Navajo language school in Window Rock in the U.S. state of Arizona that offers kids native language and English education and speaks to Dr. Audra J. Platero, the school principle to understand the challenges they are facing in preserving their native languages.

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