The Apostle Luke, the author of the Gospel of Luke and Acts, was a native of Antioch in Syria, a Greek speaking region. His writings were in Greek.
Peace be with you
To live and conduct business as a Jew in Jerusalem in Jesus’s day one could handle Greek, Latin, Hebrew and Aramaic. I don’t doubt that many of the Disciples could read and write, probably in more than one language. A tax collector would use Hebrew, Latin, and probably Aramaic andf Greek. Even a man with a fish business would use more than one language there.