EN
The paper focuses on the scientific research of prof. PhDr. Jozef Ružička, DrSc., who uncovered grammatical aspects of the Slovak to foreign students in his presentations at the Summer School of Slovak Language and Culture Studia Academica Slovaca. In his lectures, he helped participants to see Slovak as confident competitive Central European language which is able to respond to the dynamic changes resulting from the communication needs of the language users. Taking into account the long-term scientific research of Jozef Ružička, the author interprets the contribution of his lectures which were published in anthologies named Studia Academica Slovaca between 1965 and 1979.