Cantonese Speaking World
With China booming and interest in Mandarin Chinese at a very high level, Cantonese (Yue Chinese) has also increased in popularity as it is spoken widely in southern China where some of China's major manufacturing centers are located.
Primarily spoken in Hong Kong, Macau and the Guangdong province, which includes the major cities of Guangzhou and Shenzhen, Cantonese is a lingua franca in the area. Even a few words come in very handy for travel and business and can open up otherwise seemingly impenetrable doors.
Additionally, much of the Chinese encountered in "Chinatowns" around the world is Cantonese, and much of what people outside of China consider to be Chinese food is actually from the Canton region!