Following are a number of back-translations as well as a sample translation for translators of Isaiah 60:20:

• Kupsabiny: “Your sun shall not set/go down again
  nor your moon hide itself
  because God is your light forever,
  and the days of suffering shall come to an end.” (Source: Kupsabiny Back Translation)
• Newari: “Your sun will never set,
  your moon will never go into non-existence.
  The LORD will always be light for you
  and your days of sorrow will come to an end [lit.: go into non-existence].” (Source: Newari Back Translation)
• Hiligaynon: “I will-be your (sing.) sun and moon which will- no-longer -set; I am your (sing.) light without end. And your (sing.) sufferings will- now -stop/cease.” (Source: Hiligaynon Back Translation)