The studies in this collection seek to examine the notions of ‘linguistic diversity’ and ‘hybridity’ through the lenses of new critical theories and theoretical frameworks embedded within the broader discussion of the sociolinguistics of globalization. The chapters include critical inquiries into online/offline languages in society, language users, language learners and language teachers who may operate ‘between’ languages and are faced with decisions to navigate, negotiate and invent or re-invent languages, local and global and virtual spaces. The research took place in contexts that include linguistic landscapes, schools, classrooms, neighborhoods and virtual spaces of Australia, Bangladesh, Canada, Japan, Kazakhstan, Mongolia, South Korea and the USA.