I think that wraps around to the issue one of the other comments raised, which is the contention that less effort has been put into this area compared to, say,

I think that wraps around to the issue one of the other comments raised, which is the contention that less effort has been put into this area compared to, say, the civilizations whose languages are represented on the Rosetta Stone. Who's to say that there isn't one for Kush, buried in some undiscovered site? Or, what about using ML to investigate similarities in construction and form between the languages conveyed in Meroitic and other languages?