Isaiah 33:19

Thou shalt not see a fierce people,.... A people of a fierce countenance, as in Daniel 8:23 fierce in their looks, furious in their temper, cruel and bloodthirsty in their practices, confirmed and hardened in their sins, whose consciences are seared as with a red hot iron; a character given of the Papists, 1 Timothy 4:2 these shall be no more seen nor feared:

a people of a deeper speech than thou canst perceive; than the people in common could, having their worship and devotion not in their mother tongue, but in the Latin tongue:

of a stammering tongue, [that thou canst] not understand: meaning the same as before, a barbarous language, as everyone is to those who understand it not; so the Syriac and Assyrian languages were to the Jews, 2 Kings 18:26 and so the Roman language to other nations; but now no more to be used in religious worship; nor shall the church of God be any more visited by Turks or Papists, and be in any dread of them more.