Following are a number of back-translations as well as a sample translation for translators of Jeremiah 31:11:

• Kupsabiny: “It is done like that because God will return Jacob,
  he saves (them) to get out from the hands of those who have power.” (Source: Kupsabiny Back Translation)
• Hiligaynon: “I will-save them who are the descendants of Jacob from the hand of the people who are more powerful than them.” (Source: Hiligaynon Back Translation)
• English: “I will buy my Israeli people back
  from those who conquered them because they were more powerful than my people.” (Source: Translation for Translators)