Following are a number of back-translations as well as a sample translation for translators of Proverbs 21:28:

• Kupsabiny: “A person who ties words (makes false accusations) in the council/court is hated/refused,
  and the person who tells the truth is loved/accepted.” (Source: Kupsabiny Back Translation)
• Newari: “No one will listen to a person who gives false witness,
  But, everyone loves the words spoken with integrity
  (having done their conscience).” (Source: Newari Back Translation)
• Hiligaynon: “A lying witness is no-longer allowed-to-speak, but a witness who tells the truth will-be-allowed/[lit. keep-going/continue] to-speak.” (Source: Hiligaynon Back Translation)
• Kankanaey: “A lying witness will-be-caused-to-stop, but the one who listens properly, then speaks, will-be-believed.” (Source: Kankanaey Back Translation)
• English: “Those who tell lies in court will be punished;
  no one stops/silences witnesses who say what is truthful/reliable.” (Source: Translation for Translators)