Foreign language certifications for European business schools

Hello all, Many European B-school websites I’ve visited state that although one may apply to a course in which the medium of instruction is English, still knowledge of that country’s language will be advantageous in securing an admission. For ex…

Hello all,
Many European B-school websites I've visited state that although one may apply to a course in which the medium of instruction is English, still knowledge of that country's language will be advantageous in securing an admission. For example, SDA Bocconi's MS EMIT course for which I wish to apply (through the GRE) is taught in English but a certification in Italian is a prerequisite for enrolment. How should I procure the certification and how will I know which Indian institute's certifications are considered valid for the Italian language?