Did Crowley learn Kemetology or did he derive his understanding of the Egyptian Language from then-current transliterations of the Egyptian Hieroglyphics? Joe
I don't believe he did understand the Egyptian language, or ever tried to. He obtained a translation of Stele 666 and took it at face value, errors, idosyncracies, and all. Terms like "Khabs" and "Khu" he got from Golden Dawn documents. Aiwass apparently considered this to be good enough for His purposes.
I think when people discover discrepancies between Egyptian language or religion and Thelemic usage, they get all agitated about nothing. The Book of the Law is not about Egyptology. Nuit, Hadit, and even Ra-Hoor-Khuit are not Egyptial gods revived; they're New Aeon gods loosely garbed in symbols adapted from Egyptian and Greco-Egyptian religion. (My 2 cents.)
Crowley had people translate Egyptian hieroglyphs for him. He read a translation of the Book of the Dead, etc.