Following are a number of back-translations as well as a sample translation for translators of Proverbs 15:2:

• Kupsabiny: “A wise person says words that promote understanding,
  but the foolish, stupid words flow from his mouth.” (Source: Kupsabiny Back Translation)
• Newari: “From the mouth of the wise
  come words of wisdom,
  but from the mouths of fools
  come only foolish words.” (Source: Newari Back Translation)
• Hiligaynon: “What a wise man speaks can-give wisdom, but what a foolish man speaks are all foolishness.” (Source: Hiligaynon Back Translation)
• Kankanaey: “The words of a wise-person, they make-happy one-who-learns, but the words of a foolish-person, they (lit. it) are-of- no -account.” (Source: Kankanaey Back Translation)
• English: “When wise people speak , it causes those who hear what they say to want to know more;
  foolish people continually say what is foolish.” (Source: Translation for Translators)