lingua franca (‘lıŋgwə ‘fræŋkə)

n. 1. a language used for communication among people of different mother tongues. 2. a hybrid language containing elements from several different languages used in this way. 3. any system of communication providing mutual understanding

world music (wз:ld ‘mju:zık)

n. popular music of various ethnic origins and styles outside the tradition of Western pop and rock music.