Following are a number of back-translations as well as a sample translation for translators of Psalm 22:31:

• Chichewa Contempary Chichewa translation, 2002/2016:
  “They will announce about his righteousness
  to the people who are not yet born
  for He has done this.” (Source: Mawu a Mulungu mu Chichewa Chalero Back Translation)
• Newari:
  “Even to those not yet born it will be proclaimed–
  ‘The LORD has saved His people.” (Source: Newari Back Translation)
• Hiligaynon:
  “They who (are) not yet born will-be-told that you (sing.) saved your (sing.) people,
  and you (sing.) (were) the one (who) has-done this.” (Source: Hiligaynon Back Translation)
• Eastern Bru:
  “People who are not yet born, surely in the future they will also know about God saving those who believe him.” (Source: Bru Back Translation)
• Laarim:
  “They will tell people who are not yet born his goodness,
  because the LORD did these matters.” (Source: Laarim Back Translation)
• Nyakyusa-Ngonde (back-translation into Swahili):
  “Watatangaza unyofu wake kwa ambao watazaliwa,
  watasema, ‘Mungu ndiye ambaye amefanya hayo.’” (Source: Nyakyusa Back Translation)
• English:
  “People who are not yet born, who will live in future years, will be told how Yahweh rescued his people.
  People will tell them, ‘Yahweh did it!’” (Source: Translation for Translators)