Curse filter works for chat /me and /msg

README.txt

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+Minetest 0.4.10+ mod: chat_anticurse
+=========================
+
+License of source code:
+-----------------------
+Andrey's mod for minetest game
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+http://www.gnu.org/licenses/lgpl-2.1.html
+
+Kick player out when curse word is said.

depends.txt

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+default?

init.lua

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+-- Minetest 0.4.10+ mod: chat_anticurse
+-- punish player for cursing by disconnecting them
+-- 
+-- See README.txt for licensing and other information.
+
+chat_anticurse = {}
+chat_anticurse.simplemask = {}
+-- some english and some russian curse words
+-- i don't want to keep these words as cleartext in code, so they are stored like this.
+local x1="a"
+local x2="i"
+local x3="u"
+local x4="e"
+local x5="o"
+local y1="y"
+local y2="и"
+local y3="о"
+local y4="е"
+local y5="я"
+
+chat_anticurse.simplemask[1] = " "..x1.."s" .. "s "
+chat_anticurse.simplemask[2] = " d" .. ""..x2.."ck"
+chat_anticurse.simplemask[3] = " p"..x4.."n" .. "is"
+chat_anticurse.simplemask[4] = " p" .. ""..x3.."ssy"
+chat_anticurse.simplemask[5] = " h"..x5.."" .. "r".."ny "
+chat_anticurse.simplemask[6] = " b"..x2.."" .. "tch "
+chat_anticurse.simplemask[7] = " b"..x2.."" .. "tche"
+chat_anticurse.simplemask[8] = " s"..x4.."" .. "x"
+chat_anticurse.simplemask[9] = " "..y4.."б" .. "а"
+chat_anticurse.simplemask[10] = " бл"..y5.."" .. " "
+chat_anticurse.simplemask[11] = " ж" .. ""..y3.."п"
+chat_anticurse.simplemask[12] = " х" .. ""..y1.."й"
+chat_anticurse.simplemask[13] = " ч" .. "л"..y4.."н"
+chat_anticurse.simplemask[14] = " п"..y2.."" .. "зд"
+chat_anticurse.simplemask[15] = " в"..y3.."" .. "збуд"
+chat_anticurse.simplemask[16] = " в"..y3.."з" .. "б"..y1.."ж"
+chat_anticurse.simplemask[17] = " сп"..y4.."" .. "рм"
+chat_anticurse.simplemask[18] = " бл"..y5.."" .. "д"
+chat_anticurse.simplemask[19] = " бл"..y5.."" .. "ть"
+chat_anticurse.simplemask[20] = " с" .. ""..y4.."кс"
+chat_anticurse.simplemask[21] = " f" .. ""..x3.."ck"
+chat_anticurse.simplemask[22] = ""..x1.."rs"..x4.."h"..x5.."l"..x4..""
+chat_anticurse.simplemask[23] = " c"..x3.."nt "
+
+
+
+chat_anticurse.check_message = function(name, message)
+    local checkingmessage=string.lower( name.." "..message .." " )
+	local uncensored = 0
+    for i=1, #chat_anticurse.simplemask do
+        if string.find(checkingmessage, chat_anticurse.simplemask[i], 1, plain) ~=nil then
+            uncensored = 2
+            break
+        end
+    end
+    
+    --additional checks
+    if 
+        string.find(checkingmessage, " c"..x3.."" .. "m ", 1, plain) ~=nil and 
+        not (string.find(checkingmessage, " c"..x3.."" .. "m " .. "se", 1, plain) ~=nil) and
+        not (string.find(checkingmessage, " c"..x3.."" .. "m " .. "to", 1, plain) ~=nil)
+    then
+        uncensored = 2
+    end
+    return uncensored
+end
+
+minetest.register_on_chat_message(function(name, message)
+    local uncensored = chat_anticurse.check_message(name, message)
+
+    if uncensored == 1 then
+        minetest.kick_player(name, "Hey! Was there a bad word?")
+        minetest.log("action", "Player "..name.." warned for cursing")
+        return true
+    end
+
+    if uncensored == 2 then
+        minetest.kick_player(name, "Cursing or words, inappropriate to game server. Kids may be playing here!")
+        minetest.chat_send_all("Player <"..name.."> warned for cursing" )
+        minetest.log("action", "Player "..name.." warned for cursing")
+        return true
+    end
+
+end)
+
+if minetest.chatcommands["me"] then
+    local old_command = minetest.chatcommands["me"].func
+    minetest.chatcommands["me"].func = function(name, param)
+        local uncensored = chat_anticurse.check_message(name, param)
+
+        if uncensored == 1 then
+            minetest.kick_player(name, "Hey! Was there a bad word?")
+            minetest.log("action", "Player "..name.." warned for cursing")
+            return
+        end
+
+        if uncensored == 2 then
+            minetest.kick_player(name, "Cursing or words, inappropriate to game server. Kids may be playing here!")
+            minetest.chat_send_all("Player <"..name.."> warned for cursing" )
+            minetest.log("action", "Player "..name.." warned for cursing")
+            return
+        end
+        
+        return old_command(name, param)
+    end
+end
+
+if minetest.chatcommands["msg"] then
+    local old_command = minetest.chatcommands["msg"].func
+    minetest.chatcommands["msg"].func = function(name, param)
+        local uncensored = chat_anticurse.check_message(name, param)
+
+        if uncensored == 1 then
+            minetest.kick_player(name, "Hey! Was there a bad word?")
+            minetest.log("action", "Player "..name.." warned for cursing")
+            return
+        end
+
+        if uncensored == 2 then
+            minetest.kick_player(name, "Cursing or words, inappropriate to game server. Kids may be playing here!")
+            minetest.chat_send_all("Player <"..name.."> warned for cursing" )
+            minetest.log("action", "Player "..name.." warned for cursing")
+            return
+        end
+        
+        return old_command(name, param)
+    end
+end