The current study examines how Japanese and international care workers at a geriatric healthcare facility in Japan manage one of the most fundamental elements of handover interactions -- person reference and recognition to identify a particular care receiver and discuss their specific conditions and needs. By using Conversation analysis (CA) as a central mode of inquiry, this study examines how the participants approach the establishment of referential common ground while simultaneously attending to the progressivity of ongoing activity, and how written records on care receivers are incorporated into the process. The juxtaposition of three international care workers' performances effectively illustrates how the international care workers' performative competence is co-constructed with their Japanese colleagues in this interactive process and how the participants exhibit different kinds of orientations towards the activity arranged for the dual purpose of actual handover and for the international care workers' language learning and socialization. As a contribution to a growing body of CA studies of second language talk at work, this study considers possible tensions between engaging in a language-learning activity regarding specific linguistic elements during a particular professional activity and learning to become a competent actor in the particular activity.