Following are a number of back-translations as well as a sample translation for translators of Isaiah 10:21:

• Kupsabiny: “(The/A) remnant of the people of Israel shall (re)turn to the God of power.” (Source: Kupsabiny Back Translation)
• Newari: “Only few people of Israel
  will come back to the place of the Almighty God.” (Source: Newari Back Translation)
• Hiligaynon: “A day will-come that surviving descendants of Israel, who was Jacob, will- no-longer -trust Asiria who caused- them -to-suffer, but to the LORD, the Holy God of Israel. They will-return to the Almighty God.” (Source: Hiligaynon Back Translation)