Following are a number of back-translations as well as a sample translation for translators of Jeremiah 30:18:

• Kupsabiny: “God is saying:
  I will bring back the blessings of the stomach of Jacob,
  and have mercy on where he lives/stays.
  Jerusalem will be rebuilt where it was,
  and the walls that protected that city will be raised up/rebuilt.” (Source: Kupsabiny Back Translation)
• Hiligaynon: “The LORD still said, ‘I will-restore the wealth of the cities of the descendants of Jacob, and I will-have-compassion on them. They will-cause-to-stand again their city and the firm/strong pares of it there in the very place-where- (it) -was- been -built in-the-past.” (Source: Hiligaynon Back Translation)
• English: “This is what Yahweh says:
  ‘I will bring the people of Israel back from the lands to which they were taken
  and enable them to possess their land and their houses again.
  When that happens, Jerusalem will be rebuilt on top of its ruins,
  and the king’s palace will be rebuilt to be like it was before.” (Source: Translation for Translators)