Following are a number of back-translations as well as a sample translation for translators of Isaiah 48:12:

• Kupsabiny: “Listen to me, oh, stomach of Jacob,
  you people of Israel whom I have called.
  I am the God of the beginning
  and I am of the end.” (Source: Kupsabiny Back Translation)
• Newari: “O descendants of Jacob,
  Israel, whom I have chosen, pay attention to my words, listen!
  I am God,
  I am the beginning and the end.” (Source: Newari Back Translation)
• Hiligaynon: “‘[You (plur.)] listen to me, you (plur.) who of/from-Israel whom I chose. I am God, the beginning and the ending of all.” (Source: Hiligaynon Back Translation)