This article revisits a well-known dichotomy (the ‘territorial’ and ‘personal’ principles) and develops a
four-element classification of state approaches (from the most generous to the most menacing, from the perspective of speakers of
minority languages). The article examines the implications for language policy of geographically dispersed or spatially
concentrated patterns of distribution of speakers of particular languages. We begin by exploring the general literature on
language policy, focusing in particular on the territorial and personal principles, the use of ‘threshold rules’ at municipal and
other subnational levels, and the hybrid language regimes that are often a consequence of sociolinguistic complexity. We consider
the extent to which responses to linguistic diversity across Europe may be understood by reference to these principles and
categories. We explain why we have selected particular case studies (the Baltic republics, Transylvania, Switzerland, Belgium and
Ireland) for further exploration. We conclude that, notwithstanding the value of the typologies we consider, real-life cases are
almost invariably more complex, with states implementing policies that defy categorisation, that may change over time, and that
may treat different language minorities by reference to different principles.