¡Claro! Tu historia tiene una base muy buena, y con gusto la traduzco manteniendo el mismo estilo narrativo y tono épico.
Aquí tienes tu texto en inglés:
a silver-haired swordsman who was born on a small planet called Jen 002. His name is Muriel, and he was born very weak—one of the weakest people in this world, which is inhabited by powerful swordsmen. While there are also those who use magic and different types of abilities, it was the swordsmen who ruled this world, thanks to their powerful arsenal of techniques.
Our protagonist lives in a small, forgotten family. He had a hard life with his mother and younger brother; they were very poor in a world where power ruled everything. That's why Muriel had a big dream: to lift his little family out of the misery they lived in. With this goal in mind, the boy was willing to do whatever it took—he was brave.
One day, the boy was walking by a lake. It was already quite late; he wanted to catch some fish for his family since his mother had to stay home and take care of his little brother. Suddenly, Muriel noticed something. He looked up and saw someone standing next to him. He fell back in surprise. The boy saw an old man in a very elegant suit. The old man began to laugh and asked him what he was doing fishing so late.
Muriel told him he was fishing to bring food to his family. The old man was surprised by how brave the boy was, because in this world, there were also magical beasts. While some of them were noble and kind-hearted, there were also evil ones. Deeply concerned for the boy, the old man said:
—**Look, kid. In a world this wild, you're wise and brave. You're risking yourself for your family, and I truly admire that. I can see you're noble and kind-hearted—and that's why I'd like to train you. Look—**he said, drawing a magical sword.
With great elegance, the old man launched an attack in a direction where nothing seemed to be—but the strike created a massive cut in the air. Muriel, frightened, asked how he had done such a thing. The old man replied that it was just a small sample of what he was capable of.
The boy was terrified by the man's power. The old man told him that he had seen something in Muriel that he thought no longer existed in the world. A world full of greed, envy, and where the strongest could do whatever they pleased. He saw in the boy a great nobility and immense courage for wanting to protect his family.
—That's why I decided to train you, said the old man—whose origin is still unknown.