'Language' in the Bible

In that day shall there be five cities in the land of Egypt speaking the language of Canaan, and swearing by Jehovah of hosts: one shall be called, The city of Heres.

And Eliakim and Shebna and Joah said to Rab-shakeh, Speak, we pray thee, to thy servants in Syriac, for we understand it; and speak not to us in the Jewish language in the ears of the people that are upon the wall.

And Rab-shakeh stood and cried with a loud voice in the Jewish language, and said, Hear the words of the great king, the king of Assyria!