You can freely select any modules not offered by a geography department, as these electives are intended to be taken across different disciplines. You do not have to limit yourself to the FU and can also take modules at all other universities and colleges; however, it is required that your elective modules are hosted by/belong to a study program at the Master’s level (no Bachelors modules can be accredited toward your M.Sc.). Modules offered within the BUA (Berlin University Alliance) programs can be recognized and accredited as interdisciplinary electives for your M.Sc. Unfortunately, language courses are not recognized. Nevertheless, these regulations should not prevent you from taking courses that interest you, even if you cannot receive academic credit. Courses that are not included in your overall grade can still be listed on your final diploma.

It is important that you complete a whole module, as partial credit cannot be given for completing single classes or seminars within a module. Sometimes a module consists of only one course (such as a seminar, a block seminar, a weekly lab session, etc.); sometimes, however, a module can consist of multiple courses (such as a seminar and a lecture, two seminars, a seminar and a lab session, etc.). In this case, you would need to complete all necessary courses within one module in order to have this work counted toward your degree. What constitutes a module vs. an individual course therein is always laid out in the Study and Examination Regulations for each study program (German abbreviation: StPO)  or the university's/faculty's course catalog. If you're unsure, you can ask the teaching staff responsible for the class you are interested in.