Well, 'The Unholy' is purely fictional. It was crafted by the imagination of the writers and not inspired by any actual happenings. The story and its elements were made up for entertainment purposes.
In most cases, 'Unholy' is not rooted in real events. It's probably the product of the creator's imagination and creative process. There's no evidence suggesting it's based on actual happenings.
Dubbing was the process of adding sound to a film or media. In a narrow sense, dubbing referred to the dubbing of a character's voice or the replacement of the original dialogue with another language. Dubbing required the voice to be malleable and the size of the range, but there was no specific requirement for whether the tone was good or not. Dubbing required the ability to accurately express the character's language and express different emotions and characters in different context. At present, there were some intelligent dubbing websites and software that could provide online speech-to-text and dubbing services to facilitate the production of videos and advertisement dubbing.