SwearBlocker
A profanity filter for Spigot, Paper, and Folia. Catches the bypasses people actually try.
Punctuation between letters, leet substitutions, repeated characters, reversed words, diacritics, visually-confusable Unicode (Cyrillic, fullwidth, math italic). All caught. assistant, class, bass — left alone.
Runs on chat, signs, written books, anvil renames, and a configurable list of commands. MC 1.19+.
What happens when someone swears
The bad word gets swapped. By default you get whimsical nonsense:
steve: sparkly cosmic waffle overlord, friend of hamster
Set tone: serious if you'd rather see asterisks.
Detection
If darn were blocked, all of these would still get caught:
darn exact match
daaarn repeat collapse
d@rn leet (a → @)
d.a.r.n separators
nrad reversed
därn diacritics
dаrn homoglyph fold (Cyrillic 'а')
d·a·r·n zero-widths
Phonetic matching (Metaphone, catches sound-alikes) is opt-in.
Escalation
Optional, off by default. If you want it:
actions:
enabled: true
ladder:
- { threshold: 1, window-minutes: 60, run: [replace, title, log] }
- { threshold: 3, window-minutes: 60, run: [warn, warn-staff, log] }
- { threshold: 6, window-minutes: 60, run: [mute, log], mute-duration-minutes: 10 }
- { threshold: 10, window-minutes: 60, run: [kick] }
- { threshold: 15, window-minutes: 1440, run: [ban] }
Rolling-window per player, persisted to disk.
Commands
All under /swearblocker (/sb).
/sb info · /sb test <msg> · /sb add · /sb remove · /sb exclude · /sb stats · /sb clear · /sb reload
Install
- Paper or Folia (1.20.5+):
SwearBlocker-Paper-2.0.0.jar - Spigot (1.19+):
SwearBlocker-Spigot-2.0.0.jar
Drop in plugins/, restart. No required dependencies.
Velocity?
Not in 2.0. Signed chat in 1.19.1+ blocks proxy-side rewrites unless you install a bridge plugin everywhere, and the broken-paths weren't worth shipping. Run SwearBlocker on each backend instead.
Links
- Discord — discord.gg/aJqqs2hYQJ
- Companion plugin — Broadcast++ for full-featured server announcements