Thanks for your comment. I'd love to be able to answer you in more detail. I, and most Australians, know very little about the first nations of the land. I could probably give you more detailed answers on the politics of Weimar Germany than a general overview of Aboriginal culture.

This reference may give you some enlightenment in the difference between nations, cultures, and language groups.

The first two mins of this might help re language groups.

This is an interesting overview on potential Aboriginal agriculture. The section on the Bogong moth harvest might give some insight into how groups collaborated.