User blog comment:Larry Berry/Wizarding World Schools?/@comment-26823411-20160820120930

Of the 8 large & prestigious wizarding schools known, a student from southern Europe would likely attend Beauxbatons or Durmstrang. They could also attend a smaller wizarding school or institute, or be home-schooled, which JKR has noted is the norm for many wizarding families.

As for the 3 unknown large wizarding schools, its possible one may be in the Southern Europe; however, as no school is named yet for major populations like China or India, or known wizarding locations like Australia and New Zealand, it seems more likely that the three unnamed schools are spread out wider in the world IMHO.