Following are a number of back-translations as well as a sample translation for translators of Isaiah 45:18:

• Kupsabiny: “This is what God is saying
  he who created up there in heaven.
  He is the one who formed the world/land
  and he made it to stay the way it is.
  He did not make the world to be a desert
  but he created it to be an inhabited place.
  He is saying, ‘I am God
  and there is no other.” (Source: Kupsabiny Back Translation)
• Newari: “The LORD created the heavens.
  He is God.
  He gave the earth its shapeliness,
  He gave the earth its foundations.
  He did not create the earth to be desolate,
  rather, he shaped it to be a place for people to live.
  He says like this,
  "I am the LORD, except for me there is no other god.” (Source: Newari Back Translation)
• Hiligaynon: “You (sing.), LORD, is God. You (sing.) created the heavens and the earth. You (sing.) did- not -make the earth clear/[lit. empty], but-rather you (sing.) made it in-order to-be-inhabited. You (sing.) say, ‘I am the LORD, and there is no other.” (Source: Hiligaynon Back Translation)