Hunter: Asa, you successfully turn the goblin into a mummy cohort, but he is only smart enough to speak his native tongue.  Because of the spell he'll always understand you, however.

Asa: Damn.  I don't speak Goblin.

Jason: I speak Goblin.

Hunter: The only other alternative is to buy a Helm of Comprehend Languages for about 5000gp.

Asa: Nothing is too expensive to avoid talking to the sorcerer.