The present study deals with the effect of musical expertise on the perception of fundamental frequency (f0) variations in native (French) and foreign language (Spanish). Results showed on the one hand that musical expertisefacilitates the discrimination of f0 variations in pure tones and in French words. On the other hand, they revealed that musical expertise helps native listeners of a foreign languageto discriminate stress contrasts realized, among others, by means of f0 variations.