Following are a number of back-translations as well as a sample translation for translators of Isaiah 1:6:

• Kupsabiny: “Do you see how it is with you?
  You are rotten from head to foot.
  You have wounds and infections,
  they are spreading and are not yet washed.
  Those wounds are not treated,
  they are not bandaged/tied so as to become healed.” (Source: Kupsabiny Back Translation)
• Newari: “From the sole of [your] foot
  [all the way] to [your] head
  there is no place without wounds.
  Your whole body is full of wounds, stains and blisters.
  none of it has been washed or bandaged,
  nor has soothing oil been applied.” (Source: Newari Back Translation)
• Hiligaynon: “From head to the sole-of-foot there-is-no [intensifier] part that is good, only full of wounds, welts/stripes/streaks and boils. This was-not cleansed, or bandaged, or treated-medically.” (Source: Hiligaynon Back Translation)
• English: “It is as though from the soles/bottoms of your feet to the tops of your heads
  nothing is healthy;
  there are only open wounds and cuts and sores
  that have not been cleaned or bandaged,
  and no olive oil has been put on them to heal them.” (Source: Translation for Translators)