Following are a number of back-translations as well as a sample translation for translators of Proverbs 20:27:

• Kupsabiny: “God shines light on the life/soul of a person,
  and searches/checks out that person completely.” (Source: Kupsabiny Back Translation)
• Newari: “Our inner conscience is a lamp given by the Lord.
  It examines our hearts [revealing good and evil].” (Source: Newari Back Translation)
• Hiligaynon: “Our (incl.) conscience is-used by the LORD to enlighten/[Lit. cause-to-be-clear/light] our (incl.) life, and through it we (incl.) can-search/investigate our (incl.) being.” (Source: Hiligaynon Back Translation)
• Kankanaey: “The mind or conscience of a person, it is like a light that God uses to go-through/carefully-examine his deepest/innermost thoughts.” (Source: Kankanaey Back Translation)
• English: “Our consciences are like lamps that Yahweh has given to us to enable us to know what we are thinking ;
  they reveal what is hidden deep in our minds/inner beings.” (Source: Translation for Translators)