English is the common language of India. You can go to any decent sized city and if you know English, you can get by. I would say the next most widely understoo

English is the common language of India. You can go to any decent sized city and if you know English, you can get by. I would say the next most widely understood language would be Hindi. I live in bangalore (native language is kannada) and I've almost zero problems talking to people in a mix of Hindi and English.