As far as Eva knows, they're all speaking Yamatan.

"Ah..." She droops a bit at the news that his friend's been dead for a year. "Well, maybe they'll show up here? I mean, if the train can bring us back from the dead, then..."

Maybe it can bring those already dead onboard. Yet even as she says -thinks- that, it doesn't sit well with her; it'd be like defying the order of the gods. Even the time and nature gods, for all the powers they have, can't return the dead to life.