Following are a number of back-translations as well as a sample translation for translators of Proverbs 14:5:

• Kupsabiny: “(A) person who is fond of the truth, does not give a false witness statement,
  but (a) liar ties/gives false statements about people.” (Source: Kupsabiny Back Translation)
• Newari: “A good witness will not tell lies,
  A lying witness always gives a false witness.” (Source: Newari Back Translation)
• Hiligaynon: “A trustworthy witness tells the truth, but the untrustworthy lies.” (Source: Hiligaynon Back Translation)
• Kankanaey: “The trustworthy witness, the truth is what he tells, but the not trustworthy, entirely/all lies are what he testifies.” (Source: Kankanaey Back Translation)
• English: “Witnesses who are reliable always say what is true/really happened,
  but witnesses who are not reliable constantly tell lies about what happened.” (Source: Translation for Translators)