Following are a number of back-translations as well as a sample translation for translators of Isaiah 30:12:

• Kupsabiny: “So, the God of Israel is saying
  the one who is holy,
  ‘You (plur.) are refusing the words that I am telling you
  and you trust in riot and deception.” (Source: Kupsabiny Back Translation)
• Newari: “So the Holy God of Israel says,
  "You have rejected my message,
  and put [your] hope in oppression
  and matters that are not true.” (Source: Newari Back Translation)
• Hiligaynon: “Therefore the Holy God of Israel says, ‘Because you (plur.) have-rejected my message and have-relied on oppression and deceit,” (Source: Hiligaynon Back Translation)
• English: “Therefore, this is what the Holy One of Israel says:
  ‘You have rejected my message,
  and you are relying on those who oppress and deceive others.” (Source: Translation for Translators)