KJV: Thou shalt not see a fierce people, a people of a deeper speech than thou canst perceive; of a stammering tongue, that thou canstnot 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: It shall not be quenched night nor day; the smoke thereof shall go up for ever: from generation to generation it shall lie waste; none shall pass through it for ever and ever.
NASB: It will not be quenched night or day; Its smoke will go up forever. From generation to generation it will be desolate; None will pass through it forever and ever.
KJV: And they said unto him, Thus saith Hezekiah, This day is a day of trouble, and of rebuke, and of blasphemy: for the children are come to the birth, and there is not strength to bring forth.
NASB: They said to him, "Thus says Hezekiah, 'This day is a day of distress, rebuke and rejection; for children have come to birth, and there is no strength to deliver.