Starting from theories which were advanced recently by several authors concerning the source of the principles of logic and their linguistic - conventionalistic approach, a discussion of the problem of the analysis of a language according to R. Carnap is given in this paper. This analysis serves not only the better understanding of the above mentioned theories, but also a profound study of the relation between thought and language, as well as of the basic problem concerning the foundation of logic. Moreover, the analysis of language applies to any science, especially to pure Mathematics. For methodological purposes, an introductory investigation of the development of logic and the philosophy of language is given at the beginning. Finally, the question arises, if there is thought without language. Certain views about the answer are sketched in. The author intends to investigate this matter in more detail in a future paper.