Roman Empire language used Latin
Languages
The language of the Romans was Latin, which Virgil emphasized as a source of Roman unity and tradition. Until the time of Alexander Severus (r. 222–235), the birth certificates and wills of Roman citizens had to be written in Latin. Latin was the language of the law courts in the West and of the military throughout the Empire, but was not imposed officially on peoples brought under Roman rule. This policy contrasts with that of Alexander the Great, who aimed to impose Greek throughout his empire as the official language. As a consequence of Alexander's conquests, Koine Greek had become the shared language around the eastern Mediterranean and into Asia Minor. The "linguistic frontier" dividing the Latin West and the Greek East passed through the Balkan peninsula.
language spoken official language linguistic usage dialect spoken vernacular employed