The concept of authenticity has received some attention in recent academic discourse, yet it has often been left under-defined from a sociolinguistic perspective. This volume presents the contributions of a wide range of scholars who exchanged their views on the topic at a conference in Freiburg, Germany, in November 2011. The authors address three leading questions: What are the local meanings of authenticity embedded in large cultural and social structures? What is the meaning of linguistic authenticity in delocalised and/or deterritorialised settings? How is authenticity indexed in other contexts of language expression (e.g. in writing or in political discourse)? These questions are tackled by recognised experts in the fields of sociolinguistics, linguistic anthropology, and contact linguistics. While by no means exhaustive, the volume offers a large array of case studies that contribute significantly to our understanding of the meaning of authenticity in language production and perception.