Following are a number of back-translations as well as a sample translation for translators of Jeremiah 3:13:

• Kupsabiny: “But accept (sing.) your mistake that you went astray from your God. Repent that you believed in/responded to idols under every green tree, and you did not follow my words. I God is speaking.” (Source: Kupsabiny Back Translation)
• Hiligaynon: “Only admit your (sing.) sin that you (sing.) rebelled-against the LORD your (sing.) God and followed the other gods by worshipping them under every leafy tree. You (sing.) admit that you (sing.) did- not -obey me. I, the LORD, (am) the-(one) saying this.’” (Source: Hiligaynon Back Translation)
• English: “But you must admit/say that you are guilty,
  and that you have rebelled against me, Yahweh, your God,
  that you have worshiped idols under big trees everywhere,
  and you have not obeyed me.
  You have turned away from me.” (Source: Translation for Translators)