Following are a number of back-translations as well as a sample translation for translators of Joel 2:17:

• Kupsabiny: “Let the priests cry and pray
  between the altar and the veranda
  which is at the Homestead of God.
  Let them say,
  ‘Show mercy to your people, oh God.
  Do not let them become people who are despised
  and other communities mock them.
  Do not let other nations be nagging/taunting saying,
  ‘So where is now that God of theirs?’ ’” (Source: Kupsabiny Back Translation)
• Newari: “May the priests who serve before the LORD
  weep in the open space between the entrance to the temple
  and the altar praying like this,
  O LORD, "Have pity on your people,
  do not let your people be despised.
  Do not let other nations
  mock the people who belong to you by saying,
  ‘Where is their God?’ "” (Source: Newari Back Translation)
• Hiligaynon: “Let- the priests who serve the LORD -cry between the altar and the porch of the temple, and they will-pray like this: ‘LORD, you (sing.)-pity the people whom you (sing.) possess. Do- not -allow that they will-be-put-to-shame and mocked by the other nations by saying, ‘Where (is) your (plur.) God now?’ ’” (Source: Hiligaynon Back Translation)
• Kankanaey: “The priests who are serving God in the place-between the altar and entrance of the Temple, it-is-necessary that they cry and pray and they will say, ‘You (sing.) who are God, may you (sing.) show-mercy/kindness-to these your (sing.) people. Please do not permit that other nations mock/belittle and laugh-at us (excl.) saying, ‘Where then is your God?’ ’” (Source: Kankanaey Back Translation)
• English: “Tell the priests who serve Yahweh to cry between the altar and the entrance to the temple
  and to pray this:
  ‘Yahweh, rescue/save us your people;
  do not allow people from other nations to despise us;
  do not allow them to ridicule us and say,
  ‘Why has their God abandoned them?’’” (Source: Translation for Translators)