Following are a number of back-translations as well as a sample translation for translators of Isaiah 54:7:

• Kupsabiny: “I abandoned you (plur.) only for a little while,
  but I shall gather you again
  because I feel much mercy/compassion for you (plur.)” (Source: Kupsabiny Back Translation)
• Newari: “I only abandoned you for a time.
  I will bring you back again with great compassion. ” (Source: Newari Back Translation)
• Hiligaynon: “In a short time I have-left/abandoned you (sing.), but with my great mercy I will-take- you (sing.) -back.” (Source: Hiligaynon Back Translation)