Whenever you create or update a customer's main address and billing address, you have to use the country ID supplied by SimplePin. Use this endpoint to retrieve the list of all countries supported by SimplePin.
This field is used to retrieve the provinces, countries, and names of users. It returns a customer profile based on his/her specific language settings. So if we create a customer and set his/her settings to French, then SimplePin’s parameters will also be in French.