Following are a number of back-translations as well as a sample translation for translators of Jeremiah 4:31:

• Kupsabiny: “I heard a person wailing like a women who is in labor
  the sound/mouth of a woman who is having her firstborn child.
  That noise is from Jerusalem that is begging/crying for help
  and stretches out (her) hands saying,
  ‘I am ruined today!
  These murderers have destroyed me.’” (Source: Kupsabiny Back Translation)
• Hiligaynon: “I heard a cry and groaning, like a woman who is-giving-birth to her first child. This is the cry of the residents of Zion as-if gasping for their breath. They are raising their hands and is-saying, ‘Woe to us (excl.); seems-like we (excl.) are-about-to-faint. For our (excl.) enemies who will-kill us (excl.) are- already -there.’” (Source: Hiligaynon Back Translation)
• English: “It is as though I already hear the people in Jerusalem crying very loudly,
  like a woman cries when she is giving birth to her first child;
  she gasps for breath and pleads for someone to help her.
  It is as though Jerusalem is crying, ‘Something terrible is happening to me! They are about to murder me!’” (Source: Translation for Translators)