Following are a number of back-translations as well as a sample translation for translators of Isaiah 14:4:

• Kupsabiny: “you (plur.) shall mock the king of Babylon singing,
  ‘How that bad person has come to an end!
  His pride has been defeated.” (Source: Kupsabiny Back Translation)
• Newari: “Then you will ridicule the king of Babylon like this:
  Look! Having done tyranny, the end of the king who has suppressed everyone has taken place!
  [Look!] How the destruction of his anger has come about!” (Source: Newari Back Translation)
• Hiligaynon: “you (plur.) will-mock the king of Babilonia. This is what you (plur.) -are-going-to-say:
  ‘The king who oppressess is- now -destroyed. His boastfulness has now ended.” (Source: Hiligaynon Back Translation)
• English: “When that happens, you will make fun of the King of Babylon by saying this:
  ‘You treated us cruelly, but that has ended!
  Your insolently causing others to suffer is finished!” (Source: Translation for Translators)