In most faculties, a good command of either English or German is a prerequisite for admission to doctoral studies. German language skills are not always a prerequisite, since many faculties also allow you to write your dissertation in English. Please check the required language skills of your faculty in advance. When you are admitted to doctoral studies, you need to submit proof of your language skills to the dean's office of your faculty.

Recognised language certificates:

German:

• DSH-2/ DSH-3  - Deutsche Sprachprüfung für den Hochschulzugang (German language examination for university entrance) 
• TestDaF (4x4) (German as a foreign language test)
• KDS/GDS - Kleines/Großes Deutsches Sprachdiplom (Small/big German language diploma)
• ZOP Goethe Institut - Zentrale Oberstufenprüfung Goethe-Institut (Central Upper School Examination)
• Goethe certificate C2
• DSD - Deutsches Sprachdiplom der Kultusministerkonferenz Stufe II (German Language Certificate of the Education Ministers Conference Level II)
• Telc German C1 higher education certificate

English:

• IELTS-Test (level 6.0)
• TOEFL-Test (Paper 500, Computer200, iBT 80)