The Permanent International Committee of Linguists (Comité International Permanent des Linguistes, CIPL) has organized the 18th Congress of Linguists in Seoul (July 21-26, 2008), in close collaboration with the Linguistic Society of Korea. In this book one finds the invited talks which address hot topics in various subdisciplines. In addition, the state-of-the-art papers provide an overview of the most important research areas of contemporary linguistics.