Which strategies do multilingual learners use when confronted with languages they don't yet know? Which factors are involved in activating prior linguistic knowledge in multilingual learning? This volume offers valuable insights into recent research in multilingualism, crosslinguistic influence and crosslinguistic interaction. Experts in the field examine the role of background languages in multilingual learning. All the chapters point to the heart of the question of what the «multilingual mind» is. Does learning one language actually help you learn another, and if so, why? This volume looks at languages and scenarios beyond English as a second language – Italian, Gaelic, Dutch and German, amongst others, are covered, as well as instances of third and additional language learning. Research into crosslinguistic influence and crosslinguistic interaction essentially contributes to our understanding of how language learning works when there are three or more languages in contact.