Daniel 2:4

4Then the Chaldeans said to the king in 2:4 In addition to their native language, most people involved in government or trade could speak and write in Aramaic. At this point in the book Daniel switches from writing in Hebrew to writing in Aramaic. He returns to writing in Hebrew in ch 8.Aramaic, “O king, live forever! Tell the dream to your servants, and we will declare the interpretation.”