There's definitely some research that suggests that tonal languages have some relation to ability to distinguish absolute pitch. http://deutsch.ucsd.edu/pdf/MP

There's definitely some research that suggests that tonal languages have some relation to ability to distinguish absolute pitch. http://deutsch.ucsd.edu/pdf/MP-2004-21_339-356.pdf http://deutsch.ucsd.edu/pdf/MP-2004-21_339-356.pdf > The findings from these three experiments are in accordance with the hypothesis that speakers of tone language employ absolute pitch as a feature of speech and that they refer to precise and stable absolute pitch templates in enunciating words. > The present study does not address the question of whether absolute pitch, when acquired as a feature of speech, later generalizes to music.