Following are a number of back-translations as well as a sample translation for translators of Isaiah 33:19:

• Kupsabiny: “You shall not again see those rude/violent people
  who speak a language that cannot be heard/understood.” (Source: Kupsabiny Back Translation)
• Newari: “You will not be able to see those stubborn people again,
  those people who speak a strange
  language [we] do not understand.” (Source: Newari Back Translation)
• Hiligaynon: “But you (plur.) no-longer see those proud people, whose language you (plur.) can- not -understand.” (Source: Hiligaynon Back Translation)