Following are a number of back-translations as well as a sample translation for translators of Isaiah 44:21:

• Kupsabiny: “God is saying,
  ‘Think (plur.) about these words, stomach of Jacob.
  Think (plur.), oh, people of Israel
  because you are my servants.
  I am the one who made you to be my servants.
  I will not forget you, oh, people of Israel.” (Source: Kupsabiny Back Translation)
• Newari: “O Jacob, O people Israel, remember these things,
  for you are my servant.
  I made you that you might serve me.
  O Israel, I will never forget you. ” (Source: Newari Back Translation)
• Hiligaynon: “The LORD said, ‘Remember these things, O Israel, for you (sing.) are my servant. I have made you (sing.) to serve me, and I will- never -forget you (sing.).” (Source: Hiligaynon Back Translation)