Following are a number of back-translations as well as a sample translation for translators of Isaiah 2:3:

• Kupsabiny: “Many people will say,
  ‘Let us go the Mountain of God.
  where the House of the God of Israel is.
  God will show us what we must do
  so as to follow his ways/paths.
  The teaching of God shall come from
  that mountain of Zion.
  His words comes from
  the city of Jerusalem.” (Source: Kupsabiny Back Translation)
• Newari: “Then various nations will come and say,
  "Come, let us go to the mountain of the LORD,
  to the temple of the God of Jacob.
  He will teach us His ways,
  that we might be able to go in His ways."
  The law will come out from Zion and
  the word of the LORD will come out from Jerusalem.” (Source: Newari Back Translation)
• Hiligaynon: “They will say, ‘Come/[lit. Hurry], let- us (incl.) -go-up to the mountain of the LORD, there in the temple of the God of Jacob.
  For he will-teach us (incl.) his ways so-that we (incl.) will-obey them.’
  Therefore the people will-go-home from Zion, the city of Jerusalem, bringing the law of the LORD.” (Source: Hiligaynon Back Translation)
• English: “People from many people-groups will say to each other,
  ‘Come, let’s go up to the hill,
  to the temple of Yahweh,
  to worship the God whom Jacob worshiped.
  There Yahweh will teach us what he desires us to know,
  in order that our behavior will please him.
  His teaching will be given to us in Jerusalem,
  and we will take his message from Jerusalem to other places/nations.” (Source: Translation for Translators)