Final answer:
The false statement about the Brazilian and South African constitutions is that both created parliamentary systems of government, as Brazil actually has a presidential system.
Step-by-step explanation:
The statement that is not true of the Brazilian and South African constitutions is that both created parliamentary systems of government. In fact, Brazil has a presidential system, not a parliamentary one. Both constitutions are indeed extensive and contain provisions regarding the division of powers between different levels of government. Additionally, they both empower their respective supreme or high courts with the authority to exercise judicial review over constitutional issues.