Totally tangent: One of my favorite nitpicks (some others are use of two spaces before a period, the Oxford comma, and the idea that light slows down in a medium) is that the Rosetta Stone is not trilingual: the two texts is Ancient Egyptian use different characters - Hieroglyphs and Demotic. The former is a stilted form mimicking Middle Egyptian while the latter would be accessible to more people.
So the two are not word for word same but are not different languages either.
So the two are not word for word same but are not different languages either.
For a true trilingual inscription that also helped with decipherment, see https://en.m.wikipedia.org/wiki/Behistun_Inscription