I think it's time for this instance to consider introducing a filter where users have to choose a language they know (any language), and then have to answer easy questions about it (in a specific way), before being able to post here.
It can be limited to specific posts, to limit the false-negative filtering of genuine discourse.
This should help with bots, or worse, actual humans who accepted being shaped into acting like ones. The line separating the two has become very thin anyway, given the prevalence of LLM use, both automatic AND manual.
