The publication of Hugo Baetens Beardsmore's book Bilingualism: Basic Principles by Multilingual Matters in 1982 coincided with an unprecedented upsurge of interest in bilingualism. A major reason for this was the acknowledgement that bilingualism is far more common than was previously thought, and perhaps even the norm. The number of bilinguals at the turn of the third millennium is probably greater than ever before and will continue to grow as a result of the combined forces of globalisation, automatisation, increased mobility and migration, and modernisation of foreign language...