The project put high priority on the promotion of teacher competences which are necessary for responding to and building upon the diversity found in today’s multilingual classrooms across Europe. To this end, it aims at developing a high-quality Continuous Professional Development (CPD) infrastructure which will empower English language teachers (ELTs) to integrate in multilingual classrooms the current role of English as a Lingua Franca (ELF), i.e. as the most frequently employed means of international and intercultural communication.