Bilingual Brains Use One Grammar Engine, Not Two, NYU Study Finds

NYU researchers discovered that bilingual speakers process both languages through a unified grammatical system, not separate mechanisms as previously assumed. The finding reframes decades of debate in psycholinguistics and carries implications for language pedagogy and stroke recovery. If grammar operates as a single shared engine, classroom methods that rigidly segregate languages may misalign with how bilingual brains actually work.