Following are a number of back-translations as well as a sample translation for translators of Job 30:21:

• Kupsabiny: “You have persecuted me severely
  and you have caused me much pain by your power.” (Source: Kupsabiny Back Translation)
• Newari: “You have been cruel to me.
  You have attacked me with all [Your] power” (Source: Newari Back Translation)
• Hiligaynon: “You (sing.) became violent to me. You (sing.) have-used your (sing.) mighty power to have- me -suffer.” (Source: Hiligaynon Back Translation)
• English: “He acts very cruelly toward me;
  with all of his power he causes me to suffer.” (Source: Translation for Translators)