Following are a number of back-translations as well as a sample translation for translators of Isaiah 66:10:

• Kupsabiny: “Rejoice you (plur.) on account of Jerusalem
  and all you who love her/it should be happy.
  Rejoice with her today
  all you who cry over her/it.” (Source: Kupsabiny Back Translation)
• Newari: “O [you] who love Jerusalem,
  all of you, rejoice with it,
  and rejoice with it!
  O those who mourn for it,
  now be happy, rejoice! ” (Source: Newari Back Translation)
• Hiligaynon: “You (plur.) all who love Jerusalem and mourn because of her, you (plur.) be-glad and rejoice with her,” (Source: Hiligaynon Back Translation)