This volume presents a collection of papers from the second Interfaces in Language conference, hosted from 5-7 May 2009 at the University of Kent at Canterbury by the University's Centre for Language and Lingustic Studies (CLLS). Borne of a dissatisfaction with the rigid division of linguistics into sub-disciplines, Interfaces 2 offered specialists a platform to explore links between different approaches, and attracted participation from ten countries on four continents, addressing a wide range of themes. Contributions are arranged under three thematic headings: Categories and Orthodoxies; Contact, Conflict and Repertoire; and Language and Cognition. All, in their different ways, offer a challenge to received thinking or the rigidity of established categories. The papers explore a range of linguistic interfaces, probing the frontiers at the structural level between semantics and pragmatics, or challenging the notion of a clear division between semantics and syntax. A number of papers examine, in different ways, the interface between speech and writing, while other contributors apply the techniques of linguistic analysis to the study of translation, or to the stylistics of literature or journalism. The rejection of rigid modes of thinking has produced, in Interfaces in Language 2, an eclectic collection of thought-provoking papers of rare originality and quality.