Based on a social constructivist understanding of communication and foreign language learning, this talk introduces a pedagogical lingua franca (PLF) approach. Intercultural telecollaboration exchanges enable learners of different linguacultural backgrounds to met up with each other in intercultural zones of communicative and communal interaction and to use their common target language as a pedagogical lingua franca. The PLF approach encourages speaker-learners to develop their own requirements of communicative and communal success and to use them as beacons of orientation when creatively appropriating the language taught for their own needs and purposes. Case studies carried out in secondary school settings in the European context provide evidence that the PLF approach significantly strengthens the emancipatory quality of intercultural foreign language learning.