Following are a number of back-translations as well as a sample translation for translators of Job 21:31:

• Kupsabiny: “No one is able to condemn a sinner.
  or make him pay back for what he has done.” (Source: Kupsabiny Back Translation)
• Newari: “No one will judge him guilty to his face.
  No one will take revenge for the work that he did.” (Source: Newari Back Translation)
• Hiligaynon: “No one ever rebukes a wicked man openly. No one ever repays of what he has-done.” (Source: Hiligaynon Back Translation)
• English: “There is no one who accuses wicked people,
  and there is no one who pays them back/gives them the punishment that they deserve for all the evil things that they have done.” (Source: Translation for Translators)