Following are a number of back-translations as well as a sample translation for translators of Proverbs 21:10:

• Kupsabiny: “A person who is a sinner desires to do evil,
  and (he/she) never has mercy for his/her neighbor.” (Source: Kupsabiny Back Translation)
• Newari: “Wicked people are always concerned about doing evil.
  No one gets any mercy from them.” (Source: Newari Back Translation)
• Hiligaynon: “The wicked are always wanting to do evil (thing); they do- not -have compassion/mercy towards their fellowman.” (Source: Hiligaynon Back Translation)
• Kankanaey: “A sinner desires/loves to do what is evil. He has no mercy/kindness, even to his friends.” (Source: Kankanaey Back Translation)
• English: “Wicked people are always wanting to do what is evil;
  they never act mercifully toward anyone.” (Source: Translation for Translators)