Following are a number of back-translations as well as a sample translation for translators of Isaiah 40:27:

• Kupsabiny: “Please, people of Israel,
  you who are the descendants of Jacob.
  Why are you complaining saying,
  ¨God has abandoned us
  while/so (he) does not see our troubles’?” (Source: Kupsabiny Back Translation)
• Newari: “O Jacob, why have you spoken like this? —
  "The LORD does not understand my trouble.
  Why, without even being concerned that I have endured injustice,
  are you causing [me] to suffer?"” (Source: Newari Back Translation)
• Hiligaynon: “You (plur.) people of Israel the descendants of Jacob, why are- you (plur.) -complaining that your (plur.) plans and rights are-put-to-nothing by God?” (Source: Hiligaynon Back Translation)