Beyond just western destabilization, there are just flat out people who cause issues just because. Not to mention people who are anti-AI are motivated to weaken AI.

There's no reason people wouldn't taint any source of AI-free information if it became clear that is what it was.

In seriousness, are other languages faring any better or differently in all this?

What does the "anglosphere" have to do with online libraries? Will I regret asking that?

There is no incentive for AI content or spam in shadow libraries, because why would anybody risk prison to illegally copy spam.