The book addresses the challenge of living in a multilingual world from three perspectives: socio-linguistics and the study of multilingualism in contrast, philosophy of technology with its emphasis on the world as a technosphere-how it is made, how it is experienced, and how it can be managed, and then pedagogy and the question of teaching and learning to competently negotiate multilingual environments. In today's multicultural and multilingual world, technologies provide a common ground.  The story of the technosphere as a multilingual environment offers new perspective, namely that of learning to cooperate and coordinate.