The Choctaw Code Talkers of World War I

During World War One, the Allies faced communication issues as the Germans intercepted their messages. A captain discovered that Choctaw soldiers' language was unintelligible to the Germans. The US military then used Choctaw to transmit secure messages, creating new terms for military concepts. This strategy contributed to the war's end, highlighting the irony of the US government banning the language while using it to win the war.

In what ways did the Choctaw language differ from standard military terminology?

What is the irony mentioned regarding the government's stance on the Choctaw language?