Shifting focus from monolingual to multilingual talk within conversationanalysis has offered new, radically social and post-cognitivist understandingsof bilingualism, especially through the empirical study of language alternation.This chapter presents some central ideas in the literature on language alternationand traces the emergence and development of the organisational approach. Thisprioritises a participant perspective, whereby bilinguals mobilise their linguisticresources to organise their actions in mundane and institutional settings.While languaging rather than the linguistic concept of “language” is advocatedto capture the nature of bilingual talk, extending the analysis to include multimodalaspects of social interaction is put forward as a promising directionfor future inquiry.