Many countries technically require you to have an International Driving Permit to legally drive a vehicle.
A regular, valid, drivers license from your home country will also be required, and can be in any language.
Since an international drivers license is only valid for 1 year, this could create problems for long term travelers. I solved this by carrying an 'extended to" stamp where i could fill in my own date. It might be illegal to do so, but stupid rules require stupid solutions.
Also I carried a very good copy of my drivers license which i always gave at checkpoints. If the officer wants to much money as a bribe and refuses to return your papers, you can always drive off, no harm done.