Following are a number of back-translations as well as a sample translation for translators of Jeremiah 23:18:

• Kupsabiny: “Then I am saying:
  What prophet is there who knows what God is thinking
  so that he can know what he is saying
  or who has heard what God is saying?” (Source: Kupsabiny Back Translation)
• Hiligaynon: “But who among these prophets who knows my thinking/mind? They did- not even -listen to my word or pay-attention to what I said.” (Source: Hiligaynon Back Translation)
• English: “But none of them has ever been in a council meeting in heaven
  in order to listen to a message from me.
  None of them has paid attention to anything that I, Yahweh, have said.” (Source: Translation for Translators)