Introduction. The use of three-five languages is of the greatest importance in order to form varied cooperative networks for the creation of new knowledge. Aim of the paper is to analyze the synergy between language acquisition and language learning. Materials and Methods. The search for the synergy between language acquisition and language learning involves a process of analyzing the meaning of key concepts "language acquisition", "language learning", "mother tongue" and "foreign language", and demonstrates how the key concepts are related to the idea of developing the system of external and internal perspectives. Results. The study presents a potential model for development indicating how the steps of the process are related. Conclusion. The theoretical findings of the research allow putting forth the following hypothesis: the synergy between language acquisition and language learning is efficient if language learners gradually move from the external perspective, namely, language learning, to the internal perspective, namely, language acquisition through foreign language for professional purposes peer-learning. A bibliography is included. (Contains 1 figure.)