Foreign driving licenses must be accompanied by a legalized translation in Bulgarian or an international driver’s license/permit (IDL/IDP). An IDP is available from the issuing country’s road traffic authority or motoring organization such as the AA.
You can have only one EU driving license at any one time. This license is issued by the authorities of the EU country where you usually live. If you move to another EU country and your driving license is lost, stolen, damaged or expired, you should renew, replace or exchange it in the country where you usually live.