At ISTI SS first take four years of translator classes, then after graduating as translator, can go on to 1 or 2 extra years as interpreter. This is mainly due to the exam system in Belgium. Exams are organised once a year, in June. If you fail one, you have to resit them ALL in September. All these schools also actively participate in the EU Erasmus-programme.
Students can go and study abroad on a scholarship for one or two consecuvtive semesters.
Credits are transferred from guest university towards their year-end exams. This gives students an opportunity to get to gain a better knowledge of the language and culture. Each year a lot of foreign students come to Brussels, thus enabling the students in Brussels to get practise the foreign languages through conversations and social contacts with native speakers. Hope this gives you some general idea. If you want more info on one or other school, or if you have more specific questions, do let me know.