The Love I Never Knew I Needed

This is a Prussia x Reader book!! Also my first time ever writing with a language that isn't my native one :,) I will be using some other language's throughout the dialogues, and I am open to any help in any issues of what is being said!! I hope you enjoy the book, and sorry for my horrible English or writing in general :)
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Prussia, born into Europe's most powerful and infamous family, is feared for his unyielding strength and legendary prowess. A stoic warrior, he views love as a weakness-until his father forces him into an arranged marriage with a gentle, resilient lady-in-waiting from the Spanish Empire's wife. She is everything he is not: warm, compassionate, and unafraid of his fearsome reputation. As they navigate the turbulent world of power and politics, Prussia finds himself drawn to her in ways he never expected. For the first time in 600 years, he faces an enemy he cannot defeat: the unexpected pull of love.

This forced union, intended to strengthen alliances, brings two clashing worlds together. The court whispers of her impending doom, for how could any woman endure a life beside a man like Prussia, a man of unparalleled power, feared as much as he is respected? But with time, her steadfast heart and quiet courage challenge his unshakable ideals. As the two of them are thrown into the games of politics, power, and perhaps betrayal, Prussia must confront the possibility that love is not a distraction but a force capable of shifting destinies. And for the first time in his six centuries, he faces an adversary he has no strategy against: the woman who holds the key to his heart.