Following are a number of back-translations as well as a sample translation for translators of Proverbs 21:18:

• Kupsabiny: “A wicked person is punished,
  and a righteous person is released/freed.” (Source: Kupsabiny Back Translation)
• Newari: “The wicked themselves will have to bear the trouble
  which they try to give to the righteous.” (Source: Newari Back Translation)
• Hiligaynon: “The wicked and unfaithful are-punished so-that the righteous will-be-saved.” (Source: Hiligaynon Back Translation)
• Kankanaey: “Sinners will endure the hardship/suffering that it is their purpose to cause- the righteous/just -to-experience.” (Source: Kankanaey Back Translation)
• English: “Wicked people bring on themselves the sufferings
  that they were trying to cause righteous people to experience.” (Source: Translation for Translators)