If you translate a sentence once using a computer, it's probably a translation. If you translate a translation, you are using a computer to regenerate computer generated content, even if it started with a human seed in the first translation. The two words only have different meanings in specific context. They CAN mean the same thing, but don't necessarily or even often.

In this case though, the article does suggest that AI is taking ai content and rewriting it, or translating from "English" to "English" a bunch of times. Which is both translation and generation.