Until 18 March 2019, foreign university students can apply for Summer courses of Polish language and culture. The project, run by the National Academic Exchange Agency (NAWA), is addressed to non- Polish citizens and who do not study in Poland in the academic year 2018/2019.

During the courses, participants have the opportunity to learn Polish intensively (about 20 hours of classes per week), to speak Polish at classes and outside (on the street, in a restaurant, during meetings with Poles), and to visit Polish cities, integrate with other foreign students or carry out projects together.
More:
https://nawa.gov.pl/jezyk-polski/letnie-kursy-jezyka-i-kultury-polskiej/o-programie