Katherine listens to his words intently, as if she could discern the meaning through willpower alone. She's only heard a few sentences spoken purely in Elvish, so she still hasn't caught on to the fact that this isn't quite the same. Not to mention she has a poor ear for languages to begin with. She isn't likely to pick out any words that aren't obvious, such as the "stop" (or possibly "wait" or "don't") before.

Not that attempting to pick out the language is distracting her too much - she's attentive when he gestures for her to watch as he exposes his arm. And there is nothing producing that blood there. Blood, but no cuts. Smoke, but no burns.

She looks up at him again. "What happened?" she asks in confused awe. "How is this possible?"

It wouldn't be the first time she continued to speak to someone who clearly couldn't understand her - what else could she do but keep trying, after all?