C03 assesses the (representational and procedural) similarities and differences in comprehenders’ processing of standard-language grammar compared with register. It asks whether one can parsimoniously assume a single mechanism and closely-linked mental representations or whether one must model standard-language and register processing via distinct mental representations and/or mechanisms. Using eye-tracking and EEG, the project investigates whether comprehenders draw on a single conceptual store (usage-based) for a word’s standard and colloquial versions (e.g. “Schuhe” and “Latschen” respectively) or whether these are represented in distinct lexical assemblies and/or processed via distinct mechanisms.