Following are a number of back-translations as well as a sample translation for translators of Isaiah 29:19:

• Kupsabiny: “God shall make happy those who bring themselves down (humble themselves)
  and the poor shall rejoice over the God of Israel.” (Source: Kupsabiny Back Translation)
• Newari: “Once more the humble will rejoice in the LORD,
  and the needy will be rejoicing with the LORD the Holy God of Israel.” (Source: Newari Back Translation)
• Hiligaynon: “The humble-ones and the poor-ones will-rejoice once again because of the LORD, the Holy God of Israel.” (Source: Hiligaynon Back Translation)
• English: “Yahweh will enable humble people to be very joyful again.
  Poor people will rejoice about what the Holy One of Israel has done.” (Source: Translation for Translators)