As one of her publishers, you might do well to encourage her to use Unsplash. If the image licencing agencies decide to come after her copyright breaches, you could be in the firing line as her publisher.

And they are increasingly active. Getty has quite a reputation for legal action (I've had to shell out £1000 when I was working at a university and a colleague was in breach of copyright).

And Alamy is catching up, along with some others.

She's using some Istock images from Google, and those images belong to Getty. I'm pretty sure she hasn't bought a licence, as she's linking back to Google as the source. Her link even says the images might be copyrighted. They are.

BTW someone said the nonsense might be due to errors in translation software. That would make sense.