I asked my good friend Elizabeth (Lizzie) Yianni-Georgiou where she got these symbols from and what they mean. She confirmed that they were ancient Sumerian symbols and that they reflect an incantation from the Egyptian Book of the Dead
Q. What language are the symbols on Sofia Boutella's face and body? Is it Egyptian or some other alphabet? https://tinyurl.com/y9attmza
A. Language is ancient Sumerian. It's from the incantation Ahmanet reads from the Book of the Dead, calling on Set, God of
She's confirmed this in a number of interviews.
The writing on Ahmanet's body comes from the ancient Egyptian funerary
text Book of the Dead and "the incantation asking the dead to come and
help her," explains the makeup artist of the lines of symbols running
from Ahmanet's face down to her legs and feet. Yianni-Georgiou used
the MAC Penultimate Eye Liner as a stylus to create the prominent
black writing, marks and lines.
For inspiration, the makeup artist studied mummies in museums and followed the backstories included in the script. "I had to take into consideration the stories that [director] Alex Kurtzman and the other guys had written to develop her and bring her to life." (Or undeath, as the case may be.)
Yianni-Georgiou added blue color to Ahmanet's fingertips, too, because she "wanted to keep her slightly tribal." The inspiration for that came from Tutankhamun himself, she said. "He had gold fingers and toe covers. So I took that and made blue finger dip to give her a slightly more tribalesque feel and then on her hand, she's got this writing about how she's due to become the queen, which we took from ancient Egyptian to tell that part of the story."
WHAT ARE THOSE LETTERS ON 'THE MUMMY'? MAKEUP ARTIST TALKS TRANSFORMING SOFIA BOUTELLA IN THE FILM
"The raised runes all over her body come from the "Book of the Dead" so
they do actually say something"
Note that these "runes" are highly stylised (to the point of being unrecognisable), appear to have been applied semi-randomly and bear very little resemblance to either Sumerian or Egyptian writings.
Since the original Book of the Dead was written in Egyptian and has been converted into Sumerian, it seems that the writing is going to be untranslatable on a direct basis.