"hiéroglyphes"
he deciphered hieroglyphics is "il a déchiffré les hiéroglyphes" in French.
Hieroglyphics = hiéroglyphes
There is no way to say open in hieroglyphics. Hieroglyphics are an ancient form of writing in pictures, not a form of speech.
Hieroglyphics is a writing system, not a language. You can ask how to write this in hieroglyphics or how to say this in Ancient Egyptian.
The French Scholar's name was Jean François Champollion.
Champollion
As stone was written in old Hieroglyphics and new hieroglyphics no one knew what it said. Until they saw at the bottom of it, it was written in Greek as well, so then a French codebreaker who knew Greek cracked the meanings in hieroglyphics. And read the stone and found out what it meant.
Here lies King Tut
Jean-pierre Champollion
No, that is not the correct spelling for the word.The correct spelling is hieroglyphics.For example:"These hieroglyphics say that whoever disturbs the tomb will be cursed for a thousand years".
The Rosetta Stone. ( May need correction )
Jean-François Champollion was the Frenchman who is credited with deciphering the Rosetta Stone and unlocking the mystery of Egyptian hieroglyphics in 1822. Champollion's work was instrumental in advancing our understanding of ancient Egyptian history and culture.