Following are a number of back-translations as well as a sample translation for translators of Proverbs 10:11:

• Kupsabiny: “The mouth of (a) righteous person brings life,
  but that of wicked person spews violence.” (Source: Kupsabiny Back Translation)
• Newari: “The mouths of good people
  are a source of life.
  The mouths of evil people
  conceal repulsive matters.” (Source: Newari Back Translation)
• Hiligaynon: “What a righteous man says can-make- the lives of others -good, but what a wicked man says can-harm.” (Source: Hiligaynon Back Translation)
• Kankanaey: “The words of a righteous-person, (they) can-be-compared to a spring that is a source of life, but the cruel/malicious, they cover-over by-means-of their words the evil that they are-doing.” (Source: Kankanaey Back Translation)
• English: “What righteous people say is like a fountain that gives life/enables people to live many years ,
  but what wicked people say hides the fact that they intend to act violently.” (Source: Translation for Translators)