The expected level of English proficiency is C1 (or better) of the Common European Framework of Reference for Languages, which translates into other tests as follows (scores indicated are minimums):
If you are not a native English speaker or if the language of instruction at your previous university was not English, we will ask you to provide evidence of strong English language skills. Please include English language test results in your application if this applies to you. English language tests should not be more than two years old at the time of your application to the BTS and should be uploaded in your online application form as a PDF or JPEG document.
The PhD programme at the BTS does not require German language skills. However, we recommend that you study German during your time with us. This will help you in your daily life in Berlin, including communicating with others at the university. Free German language courses for international doctoral candidates are offered by the Dahlem Research School at Freie Universität Berlin.