Aspexia frowns at the water. "Telepathy failed me too. It may be more than water separating us. My companion," she tilts her head at the bird, "and I have one more spell that might help. Failing that, that other demon you mentioned may be our only path forward."
Aspexia then speaks in a strange language to her familiar. The bird turns into a small winged devil, casts a spell, and then discusses with Aspexia in the strange language once more.
SpoilerFamiliar: casting Augury as its 1/day imp SLA, asking the question "Will diving into this pool of water bring us weal or woe?"
Talking: the two talk to each other using the language granted by Speak with Master.