Holy mother of...a cryptological legend reveals cracks...
The plants, animals, and minerals identified so far are primarily distributed from Texas, west to California, and south to Nicaragua, indicating a botanic garden somewhere in central Mexico.
Given this, and if the info on names given is reasonably accurate (ie general assignments if not all the specifics)...I'm throwing out a guess of an out-there dialect of Nahuatl. Very possible that's wrong tho.
Should link this to vlad when he shows, maybe he can shed a bit of light on it.