New American Standard Bible (©1995)
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.

King James Bible
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.

Darby Bible Translation
Thou shalt no more see the fierce people, a people of a deeper speech than thou canst comprehend, of a stammering tongue that cannot be understood.

English Revised Version
Thou shalt not see the fierce people, a people of a deep speech that thou canst not perceive; of a strange tongue that thou canst not understand.

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