Following are a number of back-translations as well as a sample translation for translators of Proverbs 10:23:

• Kupsabiny: “A foolish person finds pleasure in evil/sin,
  but one who is understanding is happy for/with wisdom.” (Source: Kupsabiny Back Translation)
• Newari: “A fool rejoices in evil work,
  People who have understanding
  rejoice in works of wisdom.” (Source: Newari Back Translation)
• Hiligaynon: “The happiness/pleasure of a foolish-one is to do evil, but the happiness of a man who has understanding is life that is wise.” (Source: Hiligaynon Back Translation)
• Kankanaey: “A fool is-made-happy by his-doing evil, but the thinking/reflective-person, he-is-made-happy by wiseness.” (Source: Kankanaey Back Translation)
• English: “Foolish people have fun/enjoy doing what is wrong,
  but wise/sensible people enjoy doing what is wise.” (Source: Translation for Translators)