Following are a number of back-translations as well as a sample translation for translators of Isaiah 51:22:

• Kupsabiny: “This is the word that your God is saying,
  the one who defends his people.
  ‘I shall remove that pain that I sent you,
  so that it shall no longer cause you pain again.” (Source: Kupsabiny Back Translation)
• Newari: “The LORD your God,
  who protects his people,
  he has spoken like this, "Look, I have taken the cup of staggering from your hand.
  That was the cup of my anger! And you will never drink [from it] again.” (Source: Newari Back Translation)
• Hiligaynon: “This is what the LORD your (sing.) God who defends you (plur.) says: ‘Listen! I now taking-away my wrath which is like something-to-drink which have-caused- you (plur.) -to-be-drunk. I will- no-longer -cause- you (plur.) -to-drink it again.” (Source: Hiligaynon Back Translation)