Final answer:
The New Testament was originally written in Greek, which was the language of daily life and the church in the eastern Roman Empire.
Step-by-step explanation:
The texts that make up the New Testament were originally written in Greek. During the time these texts were being written, Greek was not only the language of daily life for many in the eastern part of the Roman Empire, but also the official language of state and of the church.
The books of the New Testament, starting with the gospels, were first penned in Greek, continuing the area's strong intellectual legacy and ensuring that Greek-speaking Christians had access to reliable religious texts.
This Greek foundation for Christian scripture lasted until translations like the Latin Vulgate by Jerome in 410 came to be widely used in Western Europe, eventually solidifying Latin as the liturgical and scholarly language of the Western Church.