Following are a number of back-translations as well as a sample translation for translators of Exodus 16:15:

• Kupsabiny: “When the Israelites saw those things, they did not know those things. Then they asked themselves/one another that, ‘What is this now?’ Moses replied that, ‘This is the food God has given you.” (Source: Kupsabiny Back Translation)
• Newari: “When the Israelites saw it, they asked each other, what is it?’
  for they did not know what it was so Moses said to them, ‘It is the bread the Lord has given you to eat’.” (Source: Newari Back Translation)
• Hiligaynon: “They did- not -know what it was, so they asked-each-other, ‘What is it/that?’ Moises said to them, ‘That is the bread which the LORD gave to you (plur.) for you (plur.) to-eat.” (Source: Hiligaynon Back Translation)
• Bariai: “And so the Israel people asked amongst themselves like this, ‘What is this?’ For they hadn’t seen anything like that previously.
  And Moses spoke to them like this, ‘This is your food which the Chief gave to you.” (Source: Bariai Back Translation)
• Opo: “When people of Israel saw it, they questioned amongst themselves «And be kind of what that?» Because they not it recognized that be bread. And Moses said to them like this «It is bread which Yahweh gave you [that] you might eat.” (Source: Opo Back Translation)
• English: “When the Israeli people saw it, since they had never seen it before and did not know what it was, they said to each other, ‘What is it?’ Moses/I replied to them, ‘It is something Yahweh has given you to eat, to take the place of bread.” (Source: Translation for Translators)