Following are a number of back-translations as well as a sample translation for translators of Isaiah 48:7:

• Kupsabiny: “These things have not happened from long ago
  but now they are happening.
  Today is when you shall hear these things that you did not hear long ago.
  No person can say that he has already heard (them).” (Source: Kupsabiny Back Translation)
• Newari: “They are brand new, not things from the past.
  You have not heard about these things before today.
  So you will not be able to say [lit.: to speak like this]
  ‘Yes, I knew those things.’” (Source: Newari Back Translation)
• Hiligaynon: “I just only do it now and not before in the time-past, so-that you (plur.) will- not -say that you (plur.) know it already.” (Source: Hiligaynon Back Translation)