The document introduces the Common European Framework (CEF), which provides a common basis for designing language courses and assessing proficiency across Europe. It aims to promote mutual understanding and mobility. The CEF describes what learners need to know at different proficiency levels on a lifelong basis. It also discusses the concept of plurilingualism, where learners draw on their whole language repertoire from multiple languages. The CEF is intended to facilitate cooperation between educational institutions and recognition of language qualifications to support learners throughout their lives.