Following are a number of back-translations as well as a sample translation for translators of Proverbs 16:21:

• Kupsabiny: “People who have understanding are known to be wise/have wisdom
  and their words corrects/brings people back.” (Source: Kupsabiny Back Translation)
• Newari: “A wise man can be recognized by his thoughts.
  Gently spoken words can draw the heart.” (Source: Newari Back Translation)
• Hiligaynon: “A wise man is-acknowledged who has a right understanding, and if he is good in speaking others can-learn from him.” (Source: Hiligaynon Back Translation)
• Kankanaey: “If the way you (sing.) decide-(something) is right/correct, that is the evidence of your (sing.) wiseness. If the way you (sing.) speak is good/nice, many will-be-taught.” (Source: Kankanaey Back Translation)
• English: “People say that those who are wise learn what is right/good behavior,
  and those who talk pleasantly are able to influence others to do what is right.” (Source: Translation for Translators)