A witch outside of Yorubaland or other places in Africa where they have an established context within the society can define themselves how ever they like to some degree. However, where they do have structures in place, one should know when they are aligned with the surrounding culture and when they are not. One should also know what is originally coming from a culture, and what is an innovation, something someone made up, a misinterpretation of confused concepts perhaps due to language and terminology, or just a scam.
Be careful out there.
Blessings and Ashe!