No need to test the filter like that, the full list of banned words can be found in the code. This filter actually did some damage to Lemmy's reputation in 2020 as Lemmy was originally a closed community with strict moderation and little understanding of federation. The admins wanted a quick way to make lemmy.ml look unappealing to chaotic right-wing users. The filter is only present on this instance now, it's no longer hard-coded into all instances.

[–] original_ish_name@lemmy.ml 2 points 1 year ago* (last edited 1 year ago)

the full list of banned words can be found in the code

But that's no fun

EDIT: also my mind doesn't come with a regex parser