Following are a number of back-translations as well as a sample translation for translators of Jeremiah 5:4:

• Kupsabiny: “Then I thought in my stomach,
  ‘Truly, people who do like this
  are those who are weak and know nothing.
  They stayed/lived as if they had become foolish/confused
  who do not know what God wants for them.” (Source: Kupsabiny Back Translation)
• Hiligaynon: “I thought these are only the poor-ones who have- not -learned, they are indeed(surprise particle) fools. For they do not know the ways of the LORD their God which being-caused-to-be-followed by them.” (Source: Hiligaynon Back Translation)