Following are a number of back-translations as well as a sample translation for translators of Isaiah 65:14:

• Kupsabiny: “Those who bow to me shall sing and their stomachs/hearts rejoice,
  but you shall be crying with your stomachs paining you.
  You shall cry bitterly.” (Source: Kupsabiny Back Translation)
• Newari: “My servants will sing, rejoicing from [his] heart,
  but as for you, [you] will weep because [you] have anxiety in [your] heart,
  Because your heart weeps [you] will weep, crying out with a loud voice.” (Source: Newari Back Translation)
• Hiligaynon: “They will-sing for joy, but you (plur.) on-the-other-hand will-cry for sadness and bad feelings.” (Source: Hiligaynon Back Translation)
• English: “Those who worship and obey me will sing joyfully,
  but you evil people will wail loudly
  because you will be suffering in your inner beings.” (Source: Translation for Translators)