The IAA is not a licensing authority
I purchased an International Driving Permit from the International Automobile Authority, and in my experience, it was completely unnecessary. The IDP is just a translation of your existing license—it doesn’t add any legal authority or certify your driving skills. Despite the IAA marketing it as essential for smooth travel, when I drove in France with my Australian license (in Latin script), neither the police nor any rental car company were interested in looking at. In fact, when I did try to present it, it was usually brushed aside with "what's this for?" Considering the expense and the fact that it had no purpose, I would recommend checking with an independent source that the country you are traveling to explicitly requires it.