Following are a number of back-translations as well as a sample translation for translators of Isaiah 9:9:

• Kupsabiny: “All the people of Samaria have known these things,
  also all the people of Israel know (it).
  But those people are haughty/proud saying,” (Source: Kupsabiny Back Translation)
• Newari: “All the people of Israel
  and all who live in the city of Samaria will hear this order.
  Now they are arrogant and evil,
  [and] they will say,” (Source: Newari Back Translation)
• Hiligaynon: “And this was-known-by all the people of Israel, including Samariaits capital. Now they are-boasting and bragging saying,” (Source: Hiligaynon Back Translation)