Spoken language encompasses multiple levels of processing, spanning from low-level auditory encoding, to speech sound (i.e. phonetic) processing, to lexical and semantic processing, and to syntax and prosody. Also relevant to language is the co-existence of multiple linguistic systems (multilingualism), as well as processes that go beyond language per se, such as challenging speech processing (e.g. speech in noise), and such as the monolingual and bilingual executive control of language. Actively ongoing studies rely on the use of anatomical magnetic resonance imaging (MRI) and diffusion tensor imaging (DTI) to uncover brain structure-behaviour relationships, and on functional MRI and EEG to understand the functional bases of auditory and language processing. We also study how the brain changes functionally and structurally due to language learning and expertise. Finally, we aim to elucidate the relative contributions of experience versus of pre-existing, possibly innate influences on individual differences in linguistic/auditory skills and brain function/structure.