Following are a number of back-translations as well as a sample translation for translators of Joel 3:19:

• Kupsabiny: “Egypt will become a deserted place,
  Edom will become a desert
  because they fought against the people of Judah
  and killed people who did not have sin/mistake.” (Source: Kupsabiny Back Translation)
• Newari: “But he country of Egypt will be in desolation
  and Edom will be turned into a desert where no plant will grow,
  because of the atrocities they have done to the people living in Judah,
  because they shed innocent blood.” (Source: Newari Back Translation)
• Hiligaynon: “‘Egipto will-become a desolate place and Edom will-become a desert because they treated- the people of Juda -with-great-harshness/cruelty; they have-killed the innocent ones.” (Source: Hiligaynon Back Translation)
• Kankanaey: “As for Egipto and Edom, they will become places with no inhabitants and with no usefulness because of their having killed those-from-Juda who had no sin.” (Source: Kankanaey Back Translation)
• English: “The armies of Egypt and Edom attacked the people of Judah
  and killed many people who had not done anything that was wrong.
  So now those countries will become deserts,” (Source: Translation for Translators)