The Police Force of Hungary is abbreviated as the ORFK not the HNP. Junior Officer ranks are divided via First and Second Lieutenant not just Lieutenant.
Lieutenant's Erdos' Hungarian traditions - if you break someone's arm, you must dispense with the formalities and if you break someone's arm, you must buy them a beer are both fictional. It was written to give Jamie a new love interest.
Jamie teaches the Hungarian Police officers in plain English. There at least should be a translator as not all Hungarians learn or speak English proficiently.
Smitty uses a handgun when entering the Farmhouse. In reality, Europol officers use laptops, not firearms.