Following are a number of back-translations as well as a sample translation for translators of Proverbs 29:14:

• Kupsabiny: “When/If a king does right/justice to a poor person,
  he will rule for long (time).” (Source: Kupsabiny Back Translation)
• Newari: “A king who judges the poor with equal justice
  will rule for ever.” (Source: Newari Back Translation)
• Hiligaynon: “If the judgment of a king toward the poor ones is righteous, his ruling/reigns will-continue.” (Source: Hiligaynon Back Translation)
• Kankanaey: “The king who defends the rights of the poor, no one will snatch-away his rule forever.” (Source: Kankanaey Back Translation)
• English: “If kings judge poor people fairly,
  they will continue to rule for a long time.” (Source: Translation for Translators)