How to get the Lakȟótiyapi AAC vocabulary:
First, go to CoughDrop, or download their app from your device’s app store. They offer a 2 month free trial.
Register for a new account. When you get to the payment screen, there’s a “start 2 month free trial” button at the top of the window.
Instead of using their tool to find a home board, look for the “search for a board” box in the far upper left corner. Type “lakota” in the box and hit search. You should see the following:

Pick the box that says “Lakota1”