The research project investigates how formal and informal registers are perceived in the multilingual context of German spoken in Namibia. Through corpus-linguistic and experimental methods we investigate register differentiation (e.g., What new registers of German emerge in multilingual settings?), awareness (e.g., What features do language users pick up in their perception of register distinctions?), and attitudes towards different registers (e.g., What role do different types of features play for sociolinguistic evaluations and associations?).