Following are a number of back-translations as well as a sample translation for translators of Jeremiah 13:21:

• Kupsabiny: “What will you do when God turns people against you
  whom you thought were your friends?
  Will that not pain you
  like a woman who is giving birth?” (Source: Kupsabiny Back Translation)
• Hiligaynon: “How will you (sing.) feel when your (sing.) allied nation will-reign-over you (plur.)? Is-it not so that you (sing.) will-feel pain like a woman who is about-to-give-birth?” (Source: Hiligaynon Back Translation)