Following are a number of back-translations as well as a sample translation for translators of Isaiah 50:6:

• Kupsabiny: “I persevered/offered my back to those how beat me,
  and I allowed for my beards to be plucked out.
  I persevered insults
  and being spit in the eyes/face.” (Source: Kupsabiny Back Translation)
• Newari: “I didn’t turn away,
  but submitted to having my back beaten and,
  as for those who plucked my beard,
  From ridicule and spitting
  I did not turn my face away.” (Source: Newari Back Translation)
• Hiligaynon: “I offered my back to those who beat me and my face to those who-pull out my beard. I let them put- me -to-shame and to spit on my face.” (Source: Hiligaynon Back Translation)
• English: “I allowed people to beat me on my back
  and to pull out the whiskers in my beard because they hated me.
  I did not turn away from them
  when they made fun of me and spat on me.” (Source: Translation for Translators)