Language of the New Testament

The mainstream consensus is that the New Testament was written in a form of Koine Greek, which was the common language of the Eastern Mediterranean from the Conquests of Alexander the Great (335–323 BC) until the evolution of Byzantine Greek (c. 600).

The New Testament Gospels and Epistles were only part of a Hellenistic Jewish culture in the Roman Empire, where Alexandria had a larger Jewish population than Jerusalem, and Greek was spoken by more Jews than Hebrew. Other Jewish Hellenistic writings include those of Jason of Cyrene, Josephus, Philo, Demetrius the chronographer, Eupolemus, Pseudo-Eupolemus, Artapanus of Alexandria, Cleodemus Malchus, Aristeas, Pseudo-Hecataeus, Thallus, and Justus of Tiberias, Pseudo-Philo, many Old Testament Pseudepigrapha and the Septuagint translation of the Hebrew Bible itself.

Whereas the Classical Greek city states used different dialects of Greek, a common standard, called Koine (κοινή "common"), developed gradually in the 4th and 3rd centuries BC as a consequence of the formation of larger political structures (like the Greek colonies, Athenian Empire, and the Macedonian Empire) and a more intense cultural exchange in the Aegean area, or in other words the Hellenization of the empire of Alexander the Great.

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