What language does aishwarya rai father speak?

Aishwarya Rai's father, Krishnaraj Rai, was a marine biologist. It's likely he spoke English, as that is the language of instruction and communication in the scientific field.

It's also possible he spoke Tulu, the language spoken in the region where he grew up in Mangalore, India.

However, there is no public information confirming which language he spoke predominantly.