In order to apply, a candidate must confirm knowledge of the English language if their secondary education was not conducted in English. 

The knowledge of the English language can be demonstrated by one of the English language certificates listed below:

International English Language Testing System (IELTS)6.5
Test of English as a Foreign Language Paper-Based Test (TOEFL PBT)510
TOEFL Computer-Based Test (TOEFL CBT)3.5
TOEFL Internet-Based Test (TOEFL iBT)87
Test of English for International Communication (TOEIC)700
Test of Written English (TWE)3.5
Test of Spoken English (TSE)50
Aptis Test by British Council
International Language Certification Exam (ILCE)B2

A complete list of accepted tests/certifications confirming English language proficiency can be found here: List of certificates.pdf