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

• Kupsabiny: “A person who seeks for righteousness and has mercy on people
  finds live/well-being, love and honor.” (Source: Kupsabiny Back Translation)
• Newari: “Followers of righteousness and unceasing love
  will have life,
  they will be honored by others.” (Source: Newari Back Translation)
• Hiligaynon: “A man who really tries to live good and righteous will-live long and be-victorious, and the people will-honor him.” (Source: Hiligaynon Back Translation)
• Kankanaey: “The one who puts-forth his ability to follow a righteous/just and merciful way-of-life, it is not righteousness only that he will have, but rather also he will live-and-live (connotes long and good life) and be-praised besides.” (Source: Kankanaey Back Translation)
• English: “Those who always try to act in a fair and kind way toward others
  will live a long time and be honored/respected.” (Source: Translation for Translators)