The Magical Revolution of the Reincarnated Princess and the Genius Young Lady is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.nl fastest updating comic site. The Summary is

Anne-Sophia, the Princess who remembered her previous life at a young age, as well as her old self’s intense love of magic, set off to live out her fantasies in this fantasy world. One day, during a magical mishap, she stumbled upon a scene where her brother Algard was breaking off his engagement to his fiancee, Euphilia. What nobody could have foreseen is that this strange meeting would end up changing the course of history.