Following are a number of back-translations as well as a sample translation for translators of Proverbs 28:26:

• Kupsabiny: “A person who follows only his own thoughts is stupid,
  but a person who is understanding lives well.” (Source: Kupsabiny Back Translation)
• Newari: “People who live only by their own thoughts
  are fools.
  People who listen to the words of prudent [people]
  will be secure.” (Source: Newari Back Translation)
• Hiligaynon: “A man who only trusts in himself is foolish.
  A man who lives wisely will- not -be-harmed.” (Source: Hiligaynon Back Translation)
• Kankanaey: “One who trusts in himself (lit. his body) is foolish, but the wise-person, he has nothing to-worry-about.” (Source: Kankanaey Back Translation)
• English: “Those who believe that what they think is always right are foolish;
  those who act wisely will escape danger/be safe.” (Source: Translation for Translators)