Following are a number of back-translations as well as a sample translation for translators of Isaiah 43:18:

• Kupsabiny: “He is saying, ‘Do not think about matters that have passed
  and do not be completely occupied with what happened long ago.” (Source: Kupsabiny Back Translation)
• Newari: “Forget the matters that have already gone.
  Do not only think about past. ” (Source: Newari Back Translation)
• Hiligaynon: “But you (plur.) no-longer think of the past,” (Source: Hiligaynon Back Translation)