Following are a number of back-translations as well as a sample translation for translators of Proverbs 21:20:

• Kupsabiny: “A wise person accumulates his wealth,
  but the foolish eats it with teeth (uses it quickly).” (Source: Kupsabiny Back Translation)
• Newari: “The house of a person who has wisdom
  will be full of wealth,
  but a foolish person will lose everything he has.” (Source: Newari Back Translation)
• Hiligaynon: “A wise man really saves-up for the future, but a foolish man only spends as-much-as-(he)-wants.” (Source: Hiligaynon Back Translation)
• Kankanaey: “There-are always valuable belongings and good food in the house of a wise-person, but the foolish-person, he immediately uses-up his possessions.” (Source: Kankanaey Back Translation)
• English: “Wise people have many valuable things in their houses,
  but foolish people quickly spend/waste all their money.” (Source: Translation for Translators)