KJV: Thou shalt not see a fierce people, a people of a deeper speech than thou canst perceive; of a stammering tongue, that thou canst not understand.
NASB: You will no longer see a fierce people, A people of unintelligible speech which no one comprehends, Of a stammering tongue which no one understands.
KJV: 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.
NASB: Then Eliakim and Shebna and Joah said to Rabshakeh, "Speak now to your servants in Aramaic, for we understand it; and do not speak with us in Judean in the hearing of the people who are on the wall."