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English - along with a whole host of languages spoken in Europe, India, and the Middle East - can be traced back to an ancient language that scholars call Proto Indo-European. Now, for all intents and purposes, Proto Indo-European is an imaginary language. Sort of. It's not like Klingon or anything. It is reasonable to
Dyson spheres - technology wrapped around an entire star to maximize energy use - would be unimaginably big. But the idea of maximizing the light from a central star certainly makes sense. Imagine a sphere with a radius at the distance of Earth's orbit. Now you've got a surface area more than 100 million times