Did Goku Really Say “I Am the Hope of the Universe”?

Yes. It is in the English dub, word for word, and it is one of the most quoted things Goku has ever said. It is also not a translation of the Japanese, which says something quite different in the same scene.

What the dub says

Turning Super Saiyan against Frieza on Namek, the Funimation script has Goku declare: "I am the hope of the universe. I am the answer to all living things that cry out for peace. I am the protector of the innocent. I am the light in the darkness. I am truth. Ally to good! Nightmare to you!"

What the Japanese says

Something narrower, and much more like the character Akira Toriyama wrote. Goku names himself: a Saiyan who came from Earth to defeat Frieza, the legendary warrior whose calm heart was woken by rage, Super Saiyan Son Goku.

English renderings of that speech vary between translators in their exact phrasing, so this page does not put quotation marks around one of them and call it the wording. The substance is not in dispute and the substance is the point: it is a self-introduction, not a mission statement.

Why the difference matters

The dub gives Goku a moral office. He is protecting the innocent, answering the cries of the peaceful, standing for truth: the vocabulary of a Western superhero arriving to save people. The Japanese gives him an identity. He is a Saiyan, he came here for one specific opponent, and the thing that woke him up was anger rather than duty.

Toriyama's Goku fights because he wants to fight strong opponents, and the story is largely honest about that being a flaw. A viewer who met him through the dub met a guardian of the universe. A viewer who met him through the sub met a martial artist. Neither of them is wrong about the version they watched, which is why this argument never resolves.

So is it a fabrication?

No, and the distinction is the whole reason this page exists. A fabricated quote is one nobody wrote, and we deal with several of those elsewhere. This one was written, performed, broadcast and licensed. It is invented dialogue in an official English version, which makes it real in exactly the way "It's over 9000" is real: attribute it to the dub, not to Toriyama, and you have said something true.

How far the two tracks diverge across the rest of the series is covered in our Dragon Ball sub or dub guide, and Goku's sourced lines are on his quote page.