I assume it is due to machine translation? I do not see mentions of "failure" at all, which would be expected to exist if it was to increase variety. I think (

I assume it is due to machine translation? I do not see mentions of "failure" at all, which would be expected to exist if it was to increase variety. I think (heard) some used to translate an article back and forth a few times to get a "new" article, but maybe it could have been some kind of "paraphrasing" software like you describe (but for avoiding plagiarism detection rather than repetitions).