The term 'Classical Language of India' refers to SANSKRIT, an ancient language that has been used in India for thousands of years. SANSKRIT is one of the oldest languages in the world and is still used today in Hindu religious ceremonies and literature. It is also used in many modern Indian languages, such as Hindi and Bengali. SANSKRIT is a highly structured language with a complex grammar and a large vocabulary. It is considered to be the classical language of India and is still studied by scholars around the world.