You can get hit with a costly foreign currency conversion fee, which is separate from foreign transaction fees! (cardometry.com)
Of course, ignoring foreign currency conversion charges, which typically costs about 1 %, does not result in a very accurate estimate. (canadiancapitalist.com)
Like other credit cards, student cards come with fees such as penalty interest, annual fee, cash advance fees, foreign currency conversion fees, and others. (lifeoncredit.ca)