In today's globally integrated world, most people live and work in environments that routinely operate across linguistic and cultural domains. This course unpacks the complexities of societal and individual multilingualism and will introduce students to a variety of multilingual scenarios and research methodologies, which will enable them to engage critically with relevant theory on multilingualism and how it is managed. We will engage with real-world applications in educational policy, multiple language learning as well as studying cross-linguistic influence, code-switching and motivational factors that drive language learning.