Hindi cinema, popularly known as Bollywood and Bombay cinema, refers to India's Hindi-language film industry, based in Mumbai. The popular term Bollywood is a portmanteau of "Bombay" and "Hollywood". The industry, producing films in the Hindi language, is a part of the larger Indian cinema industry, which also includes South Indian cinema and other smaller film industries. The term 'Bollywood', often mistakenly used to refer to Indian cinema as a whole, only refers to Hindi-language films, with Indian cinema being an umbrella term that includes all the film industries in the country, each offering films in diverse languages and styles.