Following are a number of back-translations as well as a sample translation for translators of Jeremiah 23:12:

• Kupsabiny: “Their paths will be slippery and darkness covers/closes them.
  They will be made to stumble and fall.
  The days when those people shall be punished are coming
  so I shall send to (them) disaster so they are destroyed.
  It is I God who has spoken.” (Source: Kupsabiny Back Translation)
• Hiligaynon: “Therefore their path will-become slippery and dark. They will-stumble and fall-down, for I will-send them destruction in times that I will-punish them. I, the LORD, (am) the-(one) saying this.” (Source: Hiligaynon Back Translation)
• English: “Therefore, it will be as though the paths that they walk on are slippery.
  It will be as though they are being chased in the darkness,
  and there they will fall down,
  because I will cause them to experience disasters
  at the time that I will punish them.
  That will surely happen because I, Yahweh, have said it.’” (Source: Translation for Translators)