The main focus of the project is to understand how linguistic representations change over time. We will study language contact situations and use neurolinguistic methods to examine the effects of learning two different linguistic systems. The starting point is the investigation of phonological representations in language contact situations of bilingual speakers at the segmental level (vowels) as well as the suprasegmental level (intonation) using the mismatch negativity (MMN). Furthermore, alternative neurolinguistic approaches for the description of phonological feature perception and integration processes will be developed. The simultaneous acquisition and analysis of electroencephalographic (EEG) and functional magnetic resonance imaging (fMRI) data to study function and anatomy of the mental lexicon at work will be the methodological focus.