The new testament was originally written in

The New Testament was originally written in Koine Greek, which was the common language of the Mediterranean region during the 1st century AD. The authors of the New Testament, who were mostly Jewish Christians, wrote in Greek because it was the lingua franca of the Roman Empire and was widely understood by people in the Mediterranean region.

The New Testament was written in a variety of Greek dialects, including:

• Attic Greek: This was the dialect used by the authors of the Gospel of Luke and the Acts of the Apostles.
• Hellenistic Greek: This was the dialect used by the authors of the Gospel of Mark and the Gospel of Matthew.
• Koine Greek: This was the dialect used by the authors of the Gospel of John, the Epistles of Paul, and the Book of Revelation.

It's worth noting that the New Testament was not written in Hebrew, the language of the Jewish people, because the early Christian community was primarily composed of Greek-speaking Jews and Gentiles (non-Jews).