What language was spoken in Alexandria Egypt at the time of Hypatia 390 AD?

The predominant language spoken in Alexandria, Egypt at the time of Hypatia in 390 AD was Greek. Alexandria had been a major center of Greek culture and learning since its foundation by Alexander the Great in the 4th century BC. Greek remained the primary language of government, administration, education, literature, and philosophy in the city well into the Roman and Byzantine eras.