Language learning is much more than learning how to communicate in a foreign language: it encompasses identity re-construction and profound changes. During this process, learners' attitudes towards the language and its speakers may hamper or foster their successful learning. Due to the increasing importance of considering a learner holistically as a person and a language user, this study aims at delving into those socio-psychological factors that have a bearing on an individual's identity construction. It includes an empirical study on mono- and bilingual adult learners.