World cinema is a term used primarily in English-speaking countries to refer to the films and film industries of non-English-speaking countries. It is therefore often used interchangeably with the term foreign film. However, both world cinema and foreign film could be taken to refer to the films of all countries other than one's own, regardless of native language.
Bollywood is the sobriquet for the Hindi language film industry, based in Mumbai, India. The term is often incorrectly used as synecdoche to refer to the whole of Indian cinema; however, it is only a part of the large Indian film industry, which includes other production centres producing films in many languages. Bollywood is one of the largest film producers in India and one of the largest centres of film production in the world. It is more formally referred to as Hindi cinema.
The Cinema of South India is used to refer collectively to the four film industries of South India, the Tamil, the Telugu, the Malayalam and the Kannada film industries, as a single entity. They are based in Chennai, Hyderabad, Kochi and Bengaluru respectively. Although developed independently for a long period of time, gross exchange of film performers and technicians as well as globalisation helped to shape this new identity, which competes with other film industries in the world. The largest industry are the Tamil and the Telugu film industries, which are responsible for 55% of all film revenues in South India as of 2013. The industry is regulated by the South Indian Film Chamber of Commerce.