Dear Miroslav,
due to the festive season, I only got your email today. Sorry for the delay caused. Aachen University offers the following postgraduate studies: Industrial and Organisational Psychology
Mechanical Engineering (E)
Metallurgical and Materials Engineering
European Studies (Z)
Operations Research (Z)
Environmental Science (Z)
Economics (Z)
If you'd like to do something concering English or any other language, European Studies might be the most promising. Please have a look at www.rwth-aachen.de and especially on www.campus.rwth-aachen.de (click on "Aufbau-, Ergänzungs- und Zusatzstudiengänge"). There you will find more information on the issue. You should also contact the International Office to get information on the registration requirements you have to fullfil.
I hope that this was of some assistance. If you have further questions, feel free to contact us again.
Kind regards, Britta Weber (Seniorat Anglistik)