The manifestation Language Institute Days 2019, this year, as usually, officially begins on February 21, on the International Day of Mother tongue. This year, associates of the Institute held a series of lectures in primary and secondary schools in Sarajevo Canton. Among others, Erma Ramić-Kunić, MA, in the Elementary School “Avdo Smailović” talked about the importance of the International Day of Mother Language and the Development of Literacy in Bosnia and Herzegovina, and Elmira Resić, MA, presented the topic of Bosnian language from Middle age to the present days in the Third Gymnasium.