The paper discusses the philosophy of language and communication based on Immanuel Kant’s transcendental method. Firstly, the basic assumptions of methodical rationalism are presented. Subsequent sections analyse Kant’s intellectual successors: Wilhelm von Humboldt and Ernst Cassirer. Both the intellectuals adopted Kant’s point of views and both treated language as an active, cultural factor participating in the creation of reality. The article ends with a suggestion that the transcendental approach will be present in the 21th-century researches on language and communication.