Also consider the music and the message are integral with Native American. They don’t go for flights of abstract instrumental fancy like our Bach or Beethoven, call that a deficiency if you will, but it is a different cultural viewpoint. Let the narrative that goes with the music be translated alongside, and now see if it means something. Even Edward MacDowell was able to get moods out of it.
If you’re focused on the translation, you’re talking poetry, not music.