Focusing on the multi-faceted topic of Eurolects, this volume brings together knowledge and methodologies from various disciplines, including sociolinguistics, legal linguistics, corpus linguistics, and translation studies. The legislative varieties of eleven EU official and working languages (Dutch, English, Finnish, French, German, Greek, Italian, Latvian, Maltese, Polish, Spanish) are analyzed using corpus methodologies in order to investigate the variational dynamics and translation-induced patterns of the different languages. The underlying assumption is that, within the sociolinguistic continua of the EU languages, it is possible to single out specific legislative varieties (Eurolects) that originate at a supra-national level. This research hypothesis is strongly supported by the empirical findings derived from detailed corpus analyses of each language. This work represents the first systematic and comprehensive linguistic research conducted on a wide range of EU languages using the same protocol and applying corpus methodologies to the extensive Eurolect Observatory Multilingual Corpus.