Some notes:
1) The results depend on how we define spice. Many European countries use cheese to add interesting flavors to the food. Other parts of the world are more lactose intolerant and probably use spices where the west would simply use some type of cheese. A lot of berries dried or fresh could also play that role. Black currants could be easily included among spices for this purpose.
3) As a general rule, the poorest the diet, the more spices will include. If you basically eat rice each day, you will crave for something able to add a different taste each day
4) Places with more biodiversity have more choices. Small forests in Tropical areas have twenty times more tree species that entire countries in Europe so the number of possible sources of flavor is much higher.