The term 'Biblical Tongue' refers to the language of Aramaic, which was spoken in the Middle East during the time of Jesus and is still spoken today in some parts of the world. Aramaic was the language of the Jewish people during the time of Jesus and is the language of the Talmud and other Jewish religious texts. It is also the language of the Christian Bible, as many of the books of the New Testament were originally written in Aramaic.