'Language' in the Bible

In that day shall five cities in the land of Egypt speak the language of Canaan, and swear to the LORD of hosts; one shall be called, The city of destruction.

Then said Eliakim and Shebna and Joah unto Rabshakeh, Speak, I pray thee, unto thy servants in the Syrian language; for we understand it: and speak not to us in the Jews' language, in the ears of the people that are on the wall.

Then Rabshakeh stood, and cried with a loud voice in the Jews' language, and said, Hear ye the words of the great king, the king of Assyria.