Following are a number of back-translations as well as a sample translation for translators of Isaiah 51:9:

• Kupsabiny: “Oh, God, get up
  and use your power.
  Get up like in the days of old,
  the days of those generations in the very beginning.
  Was it not you who cut the monster,
  that animal of the ocean so that it was destroyed?” (Source: Kupsabiny Back Translation)
• Newari: “Do something! O LORD, use your power and save us,
  Do something as in former generations, as in the times of old.
  What! Aren’t you the one who cut Rahab, python of sea to pieces
  and pierced that python?” (Source: Newari Back Translation)
• Hiligaynon: “Alright/Okay, LORD, help us (excl.). Use your (sing.) power to save us (excl.). Help us (excl.) like what you (sing.) have-done in the time past. Was it not you (sing.) who cut/chop the dragon Rahab?” (Source: Hiligaynon Back Translation)