Following are a number of back-translations as well as a sample translation for translators of Proverbs 29:4:

• Kupsabiny: “When a king is righteous his country is supported/strengthened
  but the one who likes a thing from the left hand bad dealings/corruption) is destroying/tearing down his country.” (Source: Kupsabiny Back Translation)
• Newari: “When the king pursues justice,
  the country will become strong.
  But when the king pursues money,
  the country will be ruined.” (Source: Newari Back Translation)
• Hiligaynon: “When a king is-concerned-about justice, he strengthens his kingdom, but when he is-concerned-about bribe(s), he destroys his kingdom.” (Source: Hiligaynon Back Translation)
• Kankanaey: “A king is able-to-strengthen a nation by-means-of his righteous/just way-of-ruling, but the ruler who collects high taxes, he ruins his country.” (Source: Kankanaey Back Translation)
• English: “When a king rules justly/fairly, he causes his nation to be strong,
  but a king who is concerned only with getting more money from the people ruins his nation.” (Source: Translation for Translators)