Following are a number of back-translations as well as a sample translation for translators of Proverbs 20:9:

• Kupsabiny: “Who can say that he is righteous,
  or that he does not have sin?” (Source: Kupsabiny Back Translation)
• Newari: “Can anyone say, "My heart is clean and
  I have cleaned away my sin?"” (Source: Newari Back Translation)
• Hiligaynon: “No one can-say that his heart is now very clean, that he never has sin.” (Source: Hiligaynon Back Translation)
• Kankanaey: “Is there actually (implies no) a person who is able-to-say that his conscience (loan konsensia) is clean and he-has-been-cleansed from his sins?” (Source: Kankanaey Back Translation)
• English: “There is no one who can truthfully say, ‘I do not know of any wrong things that I have done;
  I have gotten rid of all my sinful behavior/quit doing what is sinful.’” (Source: Translation for Translators)