Multilingualism and L2 Acquisition

In recent years we have witnessed a growing interest in multilingualism and its relationship with the learning and teaching of second/foreign languages. However, multilingualism is a highly complex phenomenon, which has a direct influence on how we learn languages. For instance, do we learn a second/foreign language in a similar way in a multilingual context as in a monolingual one? What is the role of the other languages spoken in the community? Do contrasting learning contexts, like CLIL or st