This command enables and disables (toggles) a specified country's lucky nation status. If no country tag is specified, the nation you are playing as will be affected.
lucky [country tag]
|Country Tag||The tag of the country you wish to toggle the lucky nation status of. If not specified, this command will affect your current country.|
The above cheat would enable the lucky nation status for your current country, if it disabled before. If already enabled, the above command would enable the lucky nation status for your country.
This command would toggle the lucky nation status for the country with country tag BOS (Bosnia).