Hebrew and Aramaic
In the period between the writing of the Old and New Testaments HEBREW was replaced as the everyday language of the Jews by Aramaic. But the rabbis continued to use Hebrew in their learned deliberations, as we see from the Mishnah, the book of law written in that language. The majority of the Essene sect documents found among the Dead Sea Scrolls were written in Hebrew. When the actual words spoken are quoted in the New Testament they are often Aramaic, not Hebrew. Bible History Online.