Following are a number of back-translations of Romans 3:18:

• Uma: “‘They do not know at all how to submit to God.'” (Source: Uma Back Translation)
• Yakan: “They have no fear of God.'” (Source: Yakan Back Translation)
• Western Bukidnon Manobo: “And they also do not think that they should be afraid to sin against God.’ This is what the written word of God says.” (Source: Western Bukidnon Manobo Back Translation)
• Kankanaey: “and neither do they know how to fear God.'” (Source: Kankanaey Back Translation)
• Tenango Otomi: “Neither does there come into their hearts that they respect God.'” (Source: Tenango Otomi Back Translation)
• Tzeltal: “Not the slightest do they lower their eyes from fear of God, it says.” (Source: Waterhouse / Parrott in Notes on Translation October 1967, p. 1ff.)

For the Old Testament quote, see Psalm 36:1.