It is recommended that players of Zakharan Nights play PCs who are native Zakharans. Characters whose class archetype comes from the Player’s Handbook or some other source are foreigners, or at the very least, have grown up in foreign lands.
Foreign warriors are invariably called “Outlanders,” spellcasters are called “ajamis,” rogues are considered “sa’luks,” and clerics are known as “outland priests.”
Druids are not native to the Land of Fate. If a player decides to play a druid anyway (and the DM allows it), that character must be a foreigner.