Following are a number of back-translations as well as a sample translation for translators of Isaiah 63:12:

• Kupsabiny: “Where is the God who gave his power
  through Moses,
  the one who separated the water of the ocean
  and his name was famous forever.” (Source: Kupsabiny Back Translation)
• Newari: “where is he, who caused his strong arm to proceed
  toward the right arm of Moses,
  who, in order to make his own name full forever,
  divided the water before them into two parts,” (Source: Newari Back Translation)
• Hiligaynon: “Where is now the LORD who gave power to Moises, and who divide/split-up the sea before us (incl.), so-that he will-be-famous without end.” (Source: Hiligaynon Back Translation)