Well, that sure is the armor of a foreign adventurer yelling something that she thinks is very alarming, in a magically amplified voice; and that in turn is broadly the act of someone trying to be helpful, or pretending to helpfulness.  If genuinely helpful, either they recognize the Worldwound armor or they don't recognize the Asmodeanism.

"SPEAK TALDANE!" he'll yell as loud as he can.

He will already be pulling a Comprehend Languages scroll from his Holding Bag in case that doesn't work.

Well, that sure is an armored foreign adventurer yelling something that she thinks is very alarming, in a magically amplified voice; and that in turn is broadly the act of someone trying to be helpful, or pretending to helpfulness.  If genuinely helpful, either they recognize the Worldwound armor or they don't recognize the Asmodeanism.

"SPEAK TALDANE!" he'll yell as loud as he can.

He will already be pulling a Comprehend Languages scroll from his Holding Bag in case that doesn't work.