Nonstandard varieties of languages have recently become an object of new interest in scholarly research. This is very much due to the advances in the methods used in data collection and analysis, as well as the emergence of new language-theoretical frameworks. The articles in this volume stem from the 11th International Conference on Methods in Dialectology (Methods XI, August 2002, Joensuu). The theme for this conference was “Dialects across borders”. The selection of contributions included in this volume demonstrates how various kinds of borders exert major influence on linguistic behaviour all over the world. The articles have been grouped according to whether they deal primarily with the linguistic outcomes of political and historical borders between states (Part I); various kinds of social and regional boundaries, including borders in a metaphorical sense, i.e. social barriers and mental or cognitive boundaries (Part II); and finally, boundaries between languages (Part III).