The main reason for creating a foreign will is to avoid delays in winding up your estate. If a South African resident only has a South African will, the executor of his estate may have to apply for foreign court orders to recognise his right to deal with the foreign property. This could result in foreign language problems and additional administration costs. Having a foreign executor appointed by a foreign will means that your local estate can be finalised, without delays caused by obtaining recognition in a foreign jurisdiction.
A foreign will dealing with offshore assets will address specific requirements of the relevant jurisdictions and legal systems and simplify the administration of the offshore estate.