Following are a number of back-translations as well as a sample translation for translators of Isaiah 48:4:

• Kupsabiny: “I know that you do not hear/understand words.
  Your heads are dry like metal
  and you are stubborn/stiff-necked.” (Source: Kupsabiny Back Translation)
• Newari: “For I know that you are stubborn ones,
  your necks are like iron,
  and your foreheads are like bronze.” (Source: Newari Back Translation)
• Hiligaynon: “I knew how hard are your (plur.) head. Your (plur.) neck just as hard as an iron and your (plur.) forehead just as hard as bronze.” (Source: Hiligaynon Back Translation)