Following are a number of back-translations as well as a sample translation for translators of Isaiah 54:6:

• Kupsabiny: “Please Israel, God is calling you (sing.) again,
  like a woman who was chased away and is in distress.
  You are like a woman that was married while still being young,
  (and) then the husband chased (her) away.
  I am your (plur.) God.” (Source: Kupsabiny Back Translation)
• Newari: “[Like] one who has no husband
  and who is caused to feel suffering in her spirit,
  abandoned by her husband, having gotten married
  when she was a young woman, again the LORD has called you." The LORD says.” (Source: Newari Back Translation)
• Hiligaynon: “‘Jerusalem, you (sing.) are like a young wife who is-mourning because she was-left/deserted by her husband. But now I call you (sing.) to return to me.” (Source: Hiligaynon Back Translation)