Following are a number of back-translations as well as a sample translation for translators of Isaiah 30:20:

• Kupsabiny: “God made come to you
  suffering and persecution.
  But your teachers shall not get lost again,
  and you shall see those teachers with your own eyes.” (Source: Kupsabiny Back Translation)
• Newari: “Even though the LORD gives you the bread of suffering and the water of great trouble, your teachers will not be hidden. You will see them with your own eyes.” (Source: Newari Back Translation)
• Hiligaynon: “Even-if the LORD has-given you (plur.) affliction and hardship as-if-like your (plur.) food and drink, he who is your (plur.) teacher will- no-longer -hide from you (plur.). You (plur.) will-see him” (Source: Hiligaynon Back Translation)
• English: “Although now Yahweh has caused you to daily experience great troubles and suffer much, he, your teacher, will not hide himself from you. He will teach you many things clearly.” (Source: Translation for Translators)