"Another language. But it doesn't seem like he knows it either..." Yuka frowned. What could cause them to be able to understand each other before, and not now? She didn't think it could be something like Shion having forgotten language entirely. What he had said wasn't a language she knew, but it had structure to it.

She was distracted from contemplating this when she realized the implication of something Cirno had said. "Cirno... how long have you known Shion?"