American Standard Version
Thou shalt not see the fierce people, a people of a deep speech that thou canst not comprehend, of a strange tongue that thou canst not understand.

Berean Study Bible
You will no longer see the insolent, a people whose speech is unintelligible, who stammer in a language you cannot understand.

Douay-Rheims Bible
The shameless people thou shalt not see, the people of profound speech: so that thou canst not understand the eloquence of his tongue, in whom there is no wisdom.

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.

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.

World English Bible
You will no longer see the fierce people, a people of a deep speech that you can't comprehend, with a strange language that you can't understand.

Young's Literal Translation
The strong people thou seest not, A people deeper of lip than to be understood, Of a scorned tongue, there is no understanding.

Isaiah 33:19 Additional Translations ...