Adaptation to the user is of great importance in a language training system since the user, making unfamiliar, socially unacceptable sounds, must be made to feel self-confident in order to obtain best results. The Fluency project aims at creating a pronunciation trainer for foreign language learning. It uses automatic speech recognition (CMUs SPHINX II) and is guided by basic principles in foreign language learning research. We describe efforts in this project to make the interface adaptable concerning learning strategies and "golden voices".