Following are a number of back-translations as well as a sample translation for translators of Isaiah 63:3:

• Kupsabiny: “‘I trampled on my enemies like grapes
  when no one came to my aid.
  I stepped on those enemies in my anger
  so their blood sprinkled
  and colored all my clothes.” (Source: Kupsabiny Back Translation)
• Newari: “I crushed grapes alone,
  no one else [from] the nations was with me.
  In anger I crushed them,
  and in my anger I trampled them.
  The blood of their life splashed my clothes,
  and my clothes became all bloody. ” (Source: Newari Back Translation)
• Hiligaynon: “The LORD replied, ‘In my anger I trampled/treaded the nations as-if-like grapes. I alone the one-who treaded (it); no one accompanied me. Their blood spattered on my clothes; that is why my clothes were-stained.” (Source: Hiligaynon Back Translation)