Wicca is a neo-pagan religion, and the concept of the religion itself is actually quite new. However, it has its roots firmly in ancient practices, so nobody knows exactly how or when the religion began.
There is some debate about whether Wicca is a new religion or one of the oldest. Certainly Goddess centered worship has perhaps existed since before recorded history, but the modern Wicca movement was started when Gerald Gardner, known as the father of Wicca, published Witchcraft Today in 1954.
Wicca was popularised in England by Gerald B Garder in 1954. Witchcraft, on which Wicca is based on was an ancient pagan practice that dates back thousand of years, to the begining of civilization. As far as the location, it was primarily popular in Ireland, with some followers in Wales, though similar practices have been observed throughout the world.
Wicca has its own scriptures.
Wicca isn't based anywhere.
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.
No Wicca became popular in Britain in the 1950's, it did not start in the 1950's. Wicca or Paganism has been around for eons. Look back to ancient history, starting with Celtic tradition (just a place to start) even then Celtic beliefs will take you further back to when Wicca originated No one really knows when Wicca began, were not really suppose to, it is a simple fact of the faith. Shamanism, Paganism and Witchcraft has been around since the civilization of humans. But Wicca started as a religion in England in 1950's. There is no evidence of the existence of Wicca before that. Even Gerald Gardner does not claim so. That practice Gerald Gardner was referring to, that existed for a very long time, was Witchcraft, not Wicca. Wicca and Witchcraft are two things, not the same. Even Witchcraft was not called as Witchcraft since 1600. It is actually Shamanism. The word Witchcraft was introduced by the Vatican in 1600 to call all the Pagan beliefs, nature worship and Shamanism.
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.