Paulistano Portuguese varies between a tap and retroflex r at the end of a syllable, between single-vowel and diphthongal pronunciations of nasal e, and in nominal and verbal plural marking. These variables carry social information connected with neighbourhood, age, education, class, family roots in the city and speaking style.
Across the state, the retroflex “caipira r” is especially prominent in the interior, while the metropolis reflects successive international and Brazilian migrations. The SP2010 corpus consequently studies both locally rooted families and migrant speech accommodation, alongside urban vocabulary and identity.