The title is clickbait. The actual study[0] reads as follows:
> Multi-way parallel, machine generated content not only dominates the translations in lower resource languages; it also constitutes a large fraction of the total web content in those languages
This is talking specifically about text being translated into less common languages being done mostly by machine translation and that in those languages most of the content found was as a result of machine translation. This has nothing to do with English or more common languages overall.