Yes, the Native Americans still play. There is a world championship every 4 years and 46 nations participated in the last one. Even though the US and Canada have teams, the Iroquois Nation has their own team. They have some of the best players in the world.
Check this out, it's pretty short:
http://iroquoisnationals.org/the-iroquois/the-story-of-lacrosse/
Our grandfathers tell us that when lacrosse originated it was played for healing and the enjoyment of our creator. Regardless of how unworthy you may feel an individual is, that person may have the qualities that could be a great help to you some day.
Before each game, players are reminded of the reason for their participation. Lacrosse is played for the enjoyment of OUR CREATOR. Lacrosse should not be played for money, fame, or personal gain; you should be humble and of a good mind when you take your lacrosse stick in hand.