Wicca is not a centralized faith, with a centralized leader, and thus does not operate in any one location.
Wicca is found in almost every if not every country in the world.
Wicca has its own scriptures.
Wicca isn't based anywhere.
The supermarket Gelson's operates in the country of the Unites States. It is a regional market that currently operates out of the southern California region.
The Mount Vernon Ladies' Association
No. Wicca is a religion, not a language.
Wicca isn't based anywhere.
Yes, Faerie Wicca is practiced.
Georgian Wicca was created in 1970.
Wicca Craft was created in 1991.
As Wicca is a religion focusing not on race, but on the belief structures of the individual, there is not (to my knowledge) a specific African-American Wicca. If you are asking if there is a participation by African-Americans in wicca, then the answer is yes.
When a person celebrates Wicca, they are celebrating their faith within it. Wicca is not only a religion, but it's a way of living, and most Wiccan's actually celebrate Wicca every day they are part of it.