Following are a number of back-translations as well as a sample translation for translators of Isaiah 28:7:

• Kupsabiny: “Prophets are drunkards
  and (so are) the priests.
  These people stagger because of wine
  and are trembling because of beer.
  Wine has made them confused
  and (they) stagger because of beer.
  These people do not speak right/well for God
  and do not make good decisions for people.” (Source: Kupsabiny Back Translation)
• Newari: “Because the priests and the prophets as well,
  like to drink so much grape wine,
  [they] do not control their feet. Because they have drunk so much alcoholic beverage drink,
  being confused they go for a walk with feet entangled.
  If the prophets keep on getting drunk by drinking alcoholic beverage,
  [they] will not understand the visions that God gives [them].
  And the priests also, by getting drunk like that,
  will not be able to think clearly about the matters that are brought to their place.” (Source: Newari Back Translation)
• Hiligaynon: “But now the priests and the prophets are-staggering from drunkenness and no-longer have right thinking/mind. The prophets are now wrong in their understanding the vision, and the priests are no longer right in their decision.” (Source: Hiligaynon Back Translation)