Εξεταστική διαδικασία Πιστοποίησης Υπολογιστών Πώς ακριβώς γίνεται η εξέταση... You can find free English proficiency exams out there online. Having said that, they don't give official, globally accepted certificates. If you want to to acquire an official proficiency certification, you need to have a standardized check and bear the test https://www.realedu.gr/agglika/pistopoiiseis/exetaseis-university-of-michigan/