Following are a number of back-translations as well as a sample translation for translators of Proverbs 15:8:

• Kupsabiny: “God never wants/accepts sacrifices of a sinner,
  but the praying of a righteous person makes him happy.” (Source: Kupsabiny Back Translation)
• Newari: “The Lord does not rejoice
  in the sacrifices offered by the wicked,
  He rejoices in the prayers of good people.” (Source: Newari Back Translation)
• Hiligaynon: “The LORD detests the offerings of the wicked, but he is happy/glad to the prayers of the righteous.” (Source: Hiligaynon Back Translation)
• Kankanaey: “God dislikes/rejects the offering of one whose thoughts are evil, but he is pleased with the prayer of a righteous-person.” (Source: Kankanaey Back Translation)
• English: “Yahweh detests the sacrifices that are offered by wicked people;
  what delights/pleases him very much are the prayers of righteous/good people.” (Source: Translation for Translators)