Pankaj Kavde believes he is the last Chinese-language tour guide in Aurangabad, a city in the western Indian state of Maharashtra. And even he is “not speaking it any more”.

“I don’t see that many Chinese tourists,” says Kavde, who grew up in Ellora village – a 45-minute drive from Aurangabad – surrounded by what the Lonely Planet calls the “pinnacle of Deccan rock-cut architecture”.

The Ellora Caves, a Unesco World Heritage Site, are one of the largest rock-cut cave complexes in the world, a…