Following are a number of back-translations as well as a sample translation for translators of Isaiah 14:12:

• Kupsabiny: “How you fell from up,
  oh, you shining one, oh, morning star!
  You were surely thrown down
  even though you had destroyed nations in the world!” (Source: Kupsabiny Back Translation)
• Newari: “O morning star, son of the morning light,
  How you have fallen from heaven!
  [You] who have destroyed nation after nation
  Now you have gone down to the earth!” (Source: Newari Back Translation)
• Hiligaynon: “‘You (sing.) have-fallen from heaven, you (sing.) who is-called morning-star. You (sing.) were-thrown-down into the ground, you (sing.) who have-destroyed the nations.” (Source: Hiligaynon Back Translation)
• English: “You have disappeared from the earth like a star which has fallen from the sky;
  you were very well-known
  like the morning star which is seen by everyone;
  you destroyed many nations,
  but now you have been destroyed.” (Source: Translation for Translators)