There's nuances to the amount of harm dealt to the authors based on what sources you are stealing from, but it's irrelevant here, as the specific incident we're talking about is whether or not the student is the actual author of the work submitted.
It'd be the same as if I had Google Translate do my German 101 exam. I even typed the word "germuse" with my own two thumbs!
What we are talking about in this sub-thread is exclusively the 'this is clearly plagiarism' part.
If you used Google Translate for your German 101 exam, that would be academic dishonesty/cheating, but not plagiarism.
I'm largely uninterested in the specific name you want to give it and more if its worthy of punishment.