The article deals with one specific approach towards the language (speech) culture (jazyková kultura), which links this discipline with stylistics. The approach is deeply rooted in the Czech context, namely in the functional approaches towards language developed since the 1920-1930s by members of the Prague School and still widely used. The field of interest of this discipline can be divided into four main spheres: 1) present-day situation and 2) possibilities of influencing A. language and B. speech (langue and parole in the established Saussurean terminology, in other words - system and usage). In university courses described in the article, the focus is on the 2A and 2B types - the materials examined in seminars are mainly various attempts at influencing language in both above-mentioned respects, i.e. system and usage. Although various present-day materials dominate, materials from previous centuries, e.g. by Jan Hus (15th century), are also used to illustrate approaches towards such problems in the past. The main aim of the courses is to understand better 1) function, 2) methods and 3) theoretical background presented in the investigated materials and to make qualified theoretical conclusions about them, rather than to support or reject directly the opinions expressed in the materials. Attention is therefore paid above all to a description and analysis of all of the above-mentioned three points, which links the discipline of language (speech) cultivation to stylistics, but also to other disciplines (e.g. sociolinguistics). The students, as future qualified experts in the Czech language, should then be better prepared for issues they may face in their future professional career (teachers, language experts etc.), when asked to express a qualified and reliable opinion of some phenomena in modern Czech.