Following are a number of back-translations as well as a sample translation for translators of Proverbs 17:4:

• Kupsabiny: “A sinner/evil doer listens to the words of a wicked person,
  and a liar takes heed to slandering.” (Source: Kupsabiny Back Translation)
• Newari: “Evil people listen to evil words.
  Those who tell lies listen to lies.” (Source: Newari Back Translation)
• Hiligaynon: “A wicked man wants to listen to his fellow wicked (man), and a liar wants to listen to his fellow liar.” (Source: Hiligaynon Back Translation)
• Kankanaey: “What the cruel/malicious hear is the words of their companions who are cruel/malicious, the liars, it’s also their companions who are liars [ellipsis: whose words they hear].” (Source: Kankanaey Back Translation)
• English: “Those who do what is evil pay attention to people who say what is evil,
  and liars pay attention to other people’s lies.” (Source: Translation for Translators)