Following are a number of back-translations as well as a sample translation for translators of Isaiah 13:6:

• Kupsabiny: “Cry (plur.) because the day of God has come near,
  it comes like a disaster that God of power is sending.” (Source: Kupsabiny Back Translation)
• Newari: “Mourn, crying out with a large voice! The day of the LORD has come near.
  On that day the LORD Almighty will destroy.” (Source: Newari Back Translation)
• Hiligaynon: “You (plur.) cry because (it is) already near the day of the LORD, the day of destroying/destruction by the Almighty God.” (Source: Hiligaynon Back Translation)
• English: “You people of Babylon will scream because you will be terrified,
  because it will be the time that Yahweh has determined/chosen,
  the time for the all-powerful God to destroy your city.” (Source: Translation for Translators)