Computer Assisted Language Learning (CALL) is becoming increasingly in today's world, where time is a rare good and the command of foreign languages is indispensable. CALL applications allow of efficient and timesaving second language learning. This thesis takes a closer look at the history of CALL during the last fifty years, including Wang and Seneff's Translation Game. The focus of this paper lies on the CALL-SLT Project, which was developed at the University of Geneva. This project is based on two main technologies, namely machine translation and speech recognition, using the Regulus platform and aims at second language acquisition in the restaurant domain. In a more practical section the development of a version of the CALL-SLt software is described that allows learning German as an L2. A concluding evaluation of the developed software gives an idea of its strengths and weaknesses.