Which of the following empires had no written language?

How interesting that they had no written language, and they communicated through a series of knots!! Makes me wonder if they were very talkative or not – no pun intended

Sounds like a ropey old system but I suppose they could handle some quite knotty problems

so is it rude to say get knotted

Trish, maybe they used a dot matrix printer to write notes

Nix, knot heads

The aztecs did not have their own script...