Receptive multilingualism is a mode of interaction in which speakers with different linguistic backgrounds use their respective preferred languages while understanding the language of their interlocutor. The mechanisms and competences contributing to mutual understanding in this constellation are described by the concept of lingua receptiva (LaRa). Both concepts can refer to interactions in typologically close as well as distant languages (inherent or acquired LaRa) and to interactions where speakers use any language sufficiently understood by their interlocutor. This chapter argues that successful use of lingua receptiva (LaRa) in multilingual contexts both requires and contributes to language awareness. For individual LaRa users, the awareness needed consists of knowledge of the option to use this mode, basic receptive knowledge of the interlocutor’s language, conscious activation of receptive competencies, and sensitivity to the interlocutor’s level of comprehension and problems of reception during interaction. Using LaRa will conversely contribute to the language awareness of individuals, as LaRa forces speakers to consciously and often explicitly apply the required linguistic and interactive skills in practice. To promote successful use of the receptive multilingual mode in society, institutions need to develop explicit language and education policies incorporating LaRa as an independent language mode next to other multilingual modes of communication.