WUT has its own Foreign Language Centre (SJO) offering courses of many languages for WUT students. During the studies, WUT students can participate for example in Polish language classes.
WUT Foreign Language Centre (SJO) offers as well preparatory courses of English and Polish language dedicated to candidates who want to improve their language skills before starting their studies. Check WUT SJO offer of preparatory courses at:
English language: https://www.oja.sjo.pw.edu.pl/
Polish language: http://www.ojp.sjo.pw.edu.pl/en/