'Language' in the Bible

In that day five cities in the land of Egypt will speak the language of [the Hebrews of] Canaan and swear allegiance to the Lord of hosts. One [of them] will be called the City of Destruction.

Then Eliakim and Shebna and Joah said to the Rabshakeh, “Please, speak to your servants in Aramaic, because we understand it; and do not speak to us in Judean (Hebrew) in the hearing of the people who are [stationed] on the wall.”

Then the Rabshakeh stood and called out with a loud voice in Judean (Hebrew): “Hear the words of the great king, the king of Assyria.