Following are a number of back-translations as well as a sample translation for translators of Jeremiah 13:23:

• Kupsabiny: “Then God said to me,
  ‘Can a person maybe change his appearance,
  or can a leopard change its spotted-ness?
  If it was possible, you, too,
  you who are used to evil
  would be able to do what is good.” (Source: Kupsabiny Back Translation)
• Hiligaynon: “Can a dark man change the color of his skin? Can an animal leopard change its dots/spots? Of course not! So you (plur.) also, who-come-from-Jerusalem, you (plur.) can- not -do right, for it became your (plur.) accustom already to do bad.” (Source: Hiligaynon Back Translation)