What are all the hints in Acererak’s message?


In another question, I asked how to translate Acererak’s message from the Tomb of Horrors in French, but since no one could answer that yet, someone suggested in the comments that I split the answer in two, asking what all the hints are first.

So here it is. What are all the hints hidden in Acererak’s message ? (spoilers ahead)

Please answer with pages/rooms references for each hint.