Following are a number of back-translations as well as a sample translation for translators of Jeremiah 31:18:

• Kupsabiny: “I have heard Ephraim complain/moan,
  ‘You beat me, drawing me back to you like a calf that is blocked
  and I have been truly beaten.
  When/If you draw me back, I will turn and come
  because you are my God.” (Source: Kupsabiny Back Translation)
• Hiligaynon: “I have really heard the crying of those from-Efraim. They say, ‘O LORD, we are like a calf that has-not been-used-to a yoke, but you have taught us to obey you. You are the LORD our God, therefore bring us back to our land.” (Source: Hiligaynon Back Translation)
• English: “I have heard the people of Israel grieving very much and saying to me,
  ‘You punished us severely,
  like calves are beaten by their owners to train them for pulling a plow.
  So bring us back to obey/worship you again,
  because we are ready to return to you,
  because you alone are Yahweh, our God.” (Source: Translation for Translators)