There are couple of American Universities in Belgium :
Entrance examinations exist only for Civil Engineering, Architecture, Dental Sciences, Medical Sciences, Nautical Sciences and Fine Arts. Higher non-university education offers both short-term (one cycle), three-year study courses and long-term (two-cycle) four-to five-year study courses of academic level. University education takes four, five, six or seven years, depending on the discipline. Tuition is free but there are registration fees for all public institutions which are set by the government. Registration fees is around 700 Euros.
Number of courses in English are growing. Several courses are taught in English : Arts, Engineering, Business and Economics.
Master's degree(post-graduation) is for two year for most of the courses, some M.Sc. (like Economics) programs are for one year too.
IELTS is widely accepted to prove proficiency in English.