Following are a number of back-translations as well as a sample translation for translators of Proverbs 29:11:

• Kupsabiny: “Stupid people show when they are angry,
  but those who have understanding/wise swallow words.” (Source: Kupsabiny Back Translation)
• Newari: “A foolish person shows his anger,
  but a wise person will suppress it.” (Source: Newari Back Translation)
• Hiligaynon: “A foolish man can- not -control his anger, but a wise man can-control himself.” (Source: Hiligaynon Back Translation)
• Kankanaey: “A foolish-person is not able-to-restrain his anger, but as for the wise, he knows how to be-quiet while he causes-to-cool-off his anger.” (Source: Kankanaey Back Translation)
• English: “People who are wise are patient and restrain/control themselves when they are angry,
  but foolish people quickly show others that they are very angry/do not restrain themselves at all.” (Source: Translation for Translators)