This book takes a critical look at the role of language in an increasingly diversified and globalised world, using the new framework of 'sociolinguistics of globalisation' to draw together research from human geography, sociolinguistics, and intercultural communication. It argues that globalisation has resulted in a destabilisation of social and linguistic norms, and presents a 'language-in-motion' approach which addresses the inequalities and new social divisions brought by the unprecedented levels of population mobility. This book looks at language on the individual, national and transnational level, and it will be of interest to readers with backgrounds in history, politics, human geography, sociolinguistics and minority languages.