Mobile personal technologies are mostly used to support the mobile learners of a language by promoting anytime anywhere access to learning resources. In our work, we rather focus on the need to look at the communities where the learning takes place and is contextualised. This opens for a complementary usage of mobile technologies to promote anytime anywhere access to other people and the contextualisation of learning resources. In this paper, we present some initial scenarios illustrating different forms of mobility. We then identify key dimensions to understand mobility of learners across multiple communities and draw some initial implications for design of mobile technologies.