How do you say dog soldier in cheyenne language?

You do not specify which native American language, but Dog Men (incorrectly called Dog Soldiers by white Americans) were only present in a few of the Plains tribes, limiting the possible answers.

Among the Cheyenne, the Word for dog was hotame[ho-ta-may]. Members of the Dog Men Warrior Society were called Hotame-taneo'o, literally Dog Men.

Among the Kiowa, all warrior societies were traditionally termed "Dog Warriors" because all members had to have dreamed of dogs; the Koitsenko Society were "Real Dogs".

Among the Crows, a warrior no longer interested in living became micgye-wara'xe-akcewi'a, a Crazy Dog Wishing to Die. He behaved strangely, wore long sashes and carried a rattle; in battle he deliberately charged into the most dangerous part of the fight, inviting his own death.

In modern times, as a result of certain fictional Hollywood movies and the ignorance of many white people, all native American warrior societies have been called "Dog Soldiers". This is completely wrong.