What do you do if you need to understand how free and open source software licences work in different countries?
Since the publication 1st edition of the International Free and Open Source Software Law Book, available free here, the answer has been to hope that the jurisdictions that you are concerned with are covered by the book.
The 2nd edition, currently available only in hardcopy, covers includes a number of new countries not dealt with in the 1st edition. Amongst those is a chapter on Free and Open Source Software Law in South Africa. I wrote it. I hope you find it useful.