Summary: This research addresses the interrelationship of languages and cultures in the process of learning/teaching, as well as fields related to intercultural sensitivity and the understanding of other cultures in relation to one’s own. The fact that languages cannot be separated from their social and cultural contexts of use is widely recognized nowadays. In addition, for the last decade, intercultural language learning has been highlighted as a main objective of language acquisition, the term “intercultural” implying a back-and-forth movement across languages and cultures, a development of an understanding of one’s own language and culture in relation to a second one. This research includes three perspectives: a theoretical approach through a comprehensive review of the literature in the field of culture in language teaching, intercultural communication competence (ICC), and intercultural learning and teaching; the creation of material (especially in online environments); the elaboration of a framework for designing a curriculum for intercultural language learning and cultural mediation. The main objectives are: (1) to investigate the role of culture in the teaching of foreign languages and particularly the interrelationship of language and culture in the process of learning/teaching English as a foreign language in our increasingly multicultural societies; (2) to do a needs analysis with both students and teachers in the foreign language classroom; (3) to create online material that fosters self-study and the acquisition of ICC.