The Cambridge English: C2 Proficiency (CPE) certificate – formerly known as the Cambridge Certificate of Proficiency in English – is proof that you are fluent in English, so much so that you can use it fluently in demanding research, academic and professional circumstances.
It is the highest Cambridge English certification. It is aimed at those who want to certify to their employers that they can use English at the level of high-level executives or those who aim for postgraduate or doctoral studies at English-speaking universities.