Following are a number of back-translations as well as a sample translation for translators of Isaiah 25:2:

• Kupsabiny: “You made cities become a dunghill
  and guarded cities became deserted.
  The cities of our enemies are no more,
  and those cities shall never be rebuilt.” (Source: Kupsabiny Back Translation)
• Newari: “You have destroyed cities
  and [you] have also destroyed their fortresses.
  [You] have even destroyed the palaces the enemies built for [their] kings,
  and they will never be built again.” (Source: Newari Back Translation)
• Hiligaynon: “You (sing.) have-destroyed the stone-walled towns of those who-came-from other nations. You (sing.) broke-down the strong/firm/sturdy parts/portions of their towns, and these will- no-longer -be-built-up again.” (Source: Hiligaynon Back Translation)