Following are a number of back-translations as well as a sample translation for translators of Proverbs 15:14:

• Kupsabiny: “A person with understanding searches for wisdom
  but the foolish one focuses on foolish words/matters/deeds.” (Source: Kupsabiny Back Translation)
• Newari: “A wise person is eager for knowledge,
  but fools love folly.” (Source: Newari Back Translation)
• Hiligaynon: “A man who has understanding really wants to learn, but a foolish man wants more foolishness.” (Source: Hiligaynon Back Translation)
• Kankanaey: “The wise, he wants/likes to learn, but the mindless, he thinks-about what is of no use/purpose.” (Source: Kankanaey Back Translation)
• English: “Those who have good sense want to learn more;
  foolish people are very satisfied with being foolish/ignorant.” (Source: Translation for Translators)