This special issue of Nordic Journal of English Studies explores a number of themes related to the spread of English as a global language in academic and professional domains. This spread is closely linked to global trends in technological development, population mobility, transnational business organization, and education, which is increasingly driven by market forces (e.g. Ek, Ideland, Jönsson and Malmberg in press) and neo-liberal ideologies (e.g. Block, Gray and Holborow 2012). As English is being used in international business and other professional contexts, there is also a growing demand for English-medium education which is now being offered in countries outside the English-speaking world (e.g. Mok 2012). This trend can be observed in post-Bologna Europe, where the Netherlands and the Nordic countries provide the largest number of English-medium programmes and courses (Wächter and Maiworm 2008). Such rapid changes in the linguistic landscape place additional strains on students, teachers, and business professionals, who are expected to operate in bilingual or multilingual settings. At the same time, in reaction to globalization, language policies regulating the use of English in high-stakes domains have been implemented on the governmental and local level, including the parallel language use of English and local language(s) in the Nordic states (e.g. Kuteeva 2011). These policies do not always match practices but they inevitably have consequences for teachers and researchers of English working at schools, universities, and other institutions. Thus, further research into the actual uses of English in educational and professional contexts is needed. The papers published in this special issue reflect the current status of English in academic and professional contexts, above all as a lingua franca of international communication in science, education, and business. The first part deals with English in professional research and business contexts. In the opening paper, Anna Mauranen explores the phenomenon of research blogging focusing on the current perception of science blogs by the research community, their place in research