Following are a number of back-translations as well as a sample translation for translators of Isaiah 57:7:

• Kupsabiny: “You slept/laid down there on the high hill
  and you went there to go and make sacrifices.” (Source: Kupsabiny Back Translation)
• Newari: “You have gone up to the high hills for ritual sex.
  You have gone there to offer your sacrifices.” (Source: Newari Back Translation)
• Hiligaynon: “You (plur.) go-up to the high mountains and offer your (plur.) offerings there and have-illicit-sex.” (Source: Hiligaynon Back Translation)