Following are a number of back-translations as well as a sample translation for translators of Joel 3:2:

• Kupsabiny: “I will gather all communities to go to the valley of Jehoshaphat and punish them for the matters they did to my people of Israel that I have chosen. They scattered my people to other countries. They distributed my land” (Source: Kupsabiny Back Translation)
• Newari: “At that time, having gathered all the nations in one place,
  I will bring them down to the valley of Jehoshaphat.
  There on behalf of my people Israel,
  there I will judge those nations
  who scattered my people among the nations
  and those who divided up my land.” (Source: Newari Back Translation)
• Hiligaynon: “I will-gather the nations and I will-cause- them -to-go-down to the Valley/Plains of Jehoshafat. There I will-judge them because of what they have-done to the Israelinhon, the people whom I possess. They caused- my people -to-scatter to the other nations and they divided-up/partitioned my land.” (Source: Hiligaynon Back Translation)
• Kankanaey: “I will gather all nations and I will take them to the Valley/Plain of Judging. There I will judge them because of all they have done to the Israelita my people. They separated- them -from-each-other causing-(them)-to-go to other countries and they divided-up/shared-out my land Israel.” (Source: Kankanaey Back Translation)
• English: “Then in the Valley of Judgment I will gather together the people of all the other nations;
  I will judge and punish them
  because they scattered my Israeli people
  and forced them to go to other countries.
  They divided up my land” (Source: Translation for Translators)