Following are a number of back-translations as well as a sample translation for translators of Isaiah 17:12:

• Kupsabiny: “Those people who are attacking are in a very bad position.
  They are roaring like the ocean
  and make a heavy noise like armies/soldiers of countries,
  or like water that gushes forth.” (Source: Kupsabiny Back Translation)
• Newari: “Listen! There is tumult among many nations,
  like the sound of roar of the sea and high floods coming in the sea,
  their voice is to be heard.” (Source: Newari Back Translation)
• Hiligaynon: “Oh!/(Abaw! an expression of joy, surprise or the like.) The uproar/commotion of many people-groups seem-like the roaring of the big waves.” (Source: Hiligaynon Back Translation)
• English: “Listen! The armies of many nations will roar like the sea roars.
  It will sound like the noise of crashing waves.” (Source: Translation for Translators)