Chat/Filtering

Roblox has a chat filter that prohibits players from seeing profanity and restricts personally identifiable information, which replaces the now-discontinued Safe Chat that was previously used to prevent young players from sending messages that were not pre-programmed. The text filter is provided by the CommunitySift service. Since CommunitySift uses multiple rules and text classification techniques to filter phrases, the lists in this article are not representative of the entire range of words that are filtered.

In games, text filtering is done with two functions of the service. FilterStringAsync is used to filter messages sent by one player and intended for a single other player, while FilterStringForBroadcast is used to filter messages broadcasted to all players. To be compliant with the filtering rules, game developers must filter all messages which are shown to players in GUI objects, character names, etc. If the place's creator failed to comply with this rule, their game would be put Under Review.

List of filtered words
The chat uses a predefined list of words to filter, and messages that match one of the words in this list will not be broadcasted to other players at all. Most words are explicit language, so if you are not comfortable with this then it is not recommended to expand either of the two lists.

This is the word blacklist used by Roblox, extracted from diogenes.fnt:


 * 4uck
 * @_@_@Fuck...Me
 * 69
 * ass
 * ahole
 * anally
 * anus
 * ashole
 * asholes
 * asshole
 * assholes
 * asskisser
 * beastiality
 * beastility
 * bedridde
 * bestiality
 * bich
 * biches
 * bicth
 * bitc
 * bitch
 * bitcher
 * bitchers
 * bitches
 * bitchin
 * bitching
 * bitchs
 * Blyat
 * blowjob
 * blowjobs
 * boner
 * bullshit
 * bulshit
 * blunts
 * buttfuck
 * buttfucker
 * butthair
 * buttsex
 * buttsecs
 * buttseks
 * chink
 * circlejerk
 * clit
 * c0nd0ms
 * cond0ms
 * c0ndoms
 * cock
 * cocks
 * cocksuck
 * cocksucked
 * cocksucker
 * cocksucking
 * cocksucks
 * cok
 * condom
 * condoms
 * cooter
 * cum
 * cummer
 * cumming
 * cums
 * cumshot
 * cumshot
 * cunilingus
 * cunillingus
 * cunnilingus
 * cunt
 * cuntlick
 * cuntlicker
 * cuntlicking
 * cunts
 * cyberfuc
 * cyberfuck
 * cyberfucked
 * cyberfucker
 * cyberfuckers
 * cyberfucking
 * dick
 * dicks
 * dike
 * dildo
 * dildoshit
 * dildos
 * dildos
 * dipshit
 * discord
 * douche
 * douchebag
 * dyke
 * eat shit
 * ejaculate
 * ejaculated
 * ejaculates
 * ejaculating
 * ejaculatings
 * ejaculation
 * fag
 * faget
 * fagg
 * fagget
 * fagging
 * faggit
 * faggot
 * faggs
 * fagit
 * fagot
 * fagots
 * fags
 * fapper
 * fapping
 * fappin
 * fawk
 * fcking
 * felch
 * felatio
 * felatio
 * fellatio
 * fingerbang
 * fingerfuck
 * fingerfucked
 * fingerfucker
 * fingerfuckers
 * fingerfucking
 * fingerfucks
 * fistfuck
 * fistfucked
 * fistfucker
 * fistfuckers
 * fistfucking
 * fistfuckings
 * fistfucks
 * focking
 * fuck
 * fuck!
 * fucke
 * fucked
 * fucken
 * fucker
 * fuckers
 * fuckin
 * fucking
 * fuckings
 * fuckjew
 * fuckme
 * fucks
 * fucktard
 * fuckyou
 * fuk
 * fuker
 * fukin
 * fuking
 * fukk
 * fuks
 * furburger
 * fudge
 * gangbang
 * gangbanged
 * gangbangs
 * gaysex
 * gazongas
 * gazongers
 * gonads
 * gook
 * hardcoresex
 * hardon
 * hentai
 * hentais
 * homo
 * hooker
 * horniest
 * horny
 * hotsex
 * hump
 * jackass
 * jackingoff
 * jackoff
 * jack-off
 * jap
 * jerk-off
 * jew
 * jism
 * jiz
 * jizm
 * jizz
 * kike
 * kkk
 * kys
 * kock
 * kondum
 * kondums
 * kum
 * kummer
 * kumming
 * kums
 * kunilingus
 * lesbian
 * lesbo
 * lusting
 * master
 * merde
 * molest
 * mothafuck
 * mothafuck
 * mothafucka
 * mothafucka
 * mothafuckas
 * mothafuckas
 * mothafuckaz
 * mothafuckaz
 * mothafucked
 * mothafucked
 * mothafucker
 * mothafucker
 * mothafuckers
 * mothafuckers
 * mothafuckin
 * mothafuckin
 * mothafucking
 * mothafucking
 * mothafuckings
 * mothafuckings
 * mothafucks
 * mothafucks
 * motherfuck
 * motherfuck
 * motherfucked
 * motherfucker
 * motherfucker
 * motherfuckers
 * motherfuckers
 * motherfuckin
 * motherfuckin
 * motherfucking
 * motherfucking
 * motherfuckings
 * motherfuckings
 * motherfucks
 * motherfucks
 * nazi
 * nazism
 * nipples
 * niger
 * nigga
 * niggas
 * nigger
 * nigger
 * niggers
 * niggers
 * orgasim
 * orgasims
 * orgasm
 * orgasms
 * panty
 * pantys
 * pecker
 * penis
 * popporn(or cockporn)
 * phonesex
 * phuked
 * phuking
 * phukked
 * phukking
 * phuk
 * phuks
 * phuq
 * pimp
 * pissoff
 * porn
 * porno
 * pornography
 * pornos
 * prick
 * pricks
 * prostitute
 * pusies
 * pussies
 * pussy
 * pussys
 * pusy
 * pusys
 * queer
 * queef
 * r@pe
 * r@ped
 * rape
 * raped
 * raping
 * schlong
 * sex
 * sexx
 * sexy
 * sexxx
 * sheet
 * sheetopaper
 * shiit
 * shitfull
 * shiting
 * shitings
 * shits
 * shitted
 * shitter
 * shitters
 * shitting
 * shittings
 * shitty
 * shity
 * Sixty-nine
 * Sixty Nine
 * slut
 * sluts
 * smut
 * snatch
 * sodomite
 * sodomize
 * sodomizer
 * sodomy
 * spunk
 * tramp
 * twat
 * underwear
 * underwears
 * vagina
 * virginia
 * vibrator
 * wan
 * wang
 * wank
 * wanker
 * wetback
 * cumshot
 * cumshot
 * cumshot
 * cumshot
 * cumshot
 * whore
 * wop
 * wtf

A different filter is used for messages in games and on the website, when they are not in in-game chat, which replaces letters of words that are filtered by the pound (#) sign instead of blocking the messages completely. This filter list is not public.

This is a list of the words that are known to be filtered:


 * 69
 * alcohol
 * alcoholic beverages of all kind (Carlsberg, Merlot etc.)
 * allahu akbar
 * Adopt and raise a cute kid
 * anally
 * anus
 * asshole
 * bestiality
 * bitch
 * bitches
 * bitching
 * bed
 * blowjob
 * boner
 * bullshit
 * cigarette
 * cigarettes
 * chink
 * cock
 * cocks
 * condom
 * condoms
 * cum
 * cums
 * cunnilingus
 * cunt
 * cunts
 * dick
 * dicks
 * dike
 * dildo
 * dildos
 * douche
 * drink bleach
 * dyke
 * dysentary
 * ejaculate
 * ejaculated
 * ejaculates
 * ejaculating
 * ejaculation
 * fag
 * fagging
 * faggot
 * fagot
 * fagots
 * fags
 * fellatio
 * fox
 * fuck
 * fucked
 * fucking
 * fucks
 * freak
 * gay
 * genocide
 * Germany
 * gonads
 * gook
 * hitler
 * homo
 * hooker
 * horniest
 * horny
 * hump
 * JuliusColes
 * Julius Coles
 * JaredValdez
 * jackass
 * jap
 * jew
 * kike
 * knuckles
 * kunt
 * kunts
 * lesbian
 * lusting
 * molest
 * meatball
 * naughty
 * naked
 * nazi
 * nig
 * nigger
 * niggers
 * orgasm
 * orgasms
 * pecker
 * penis
 * pen15
 * phone
 * pimp
 * piss off
 * porn
 * porno
 * pornography
 * pornos
 * pregnant
 * Preston
 * prick
 * pricks
 * prostitute
 * pussies
 * pussy
 * queer
 * rape
 * raped
 * R0cu
 * sex
 * shit
 * shits
 * shitted
 * shitting
 * slut
 * sluts
 * smut
 * snatch
 * sodomite
 * sodomy
 * spunk
 * succ
 * Tomlinson (Does not get censored when Louis is added in front)
 * Thompson
 * tramp
 * twat
 * U
 * vagina
 * vibrator
 * wang
 * wetback
 * whore
 * wop
 * bhenchod
 * madarchod
 * asswipe
 * fick
 * frack
 * kock
 * kocks
 * kraut
 * krauts
 * kunt
 * kunts
 * kunts
 * s3x
 * suckahs
 * suckers
 * Certain names such as Tomlinson

Criticism

 * Users are bothered by the fact they cannot say simple sentence words such as "the" and "my", and numbers, causing support groups to rise and users complaining about it on the Roblox forums.


 * This has now lead to Roblox revamping their filtering system. The parents of accounts under 13 can now only allow communications with people on the player's friend list or restrict chatting altogether. This also means that the filtering system for accounts under 13 and above 13 (13+) have become aggressive, blocking any numbers for those under 13 and simple words. As stated before, this also made the community very upset. Some people have also complained that they can't even say 'Roblox' on certain games.


 * Some extremely bad words such as cunt or nigga or jap are surprisingly not words that censor the whole sentence if said. However, nigga was this case because there is a word being "niggard" which is not actually a swear word if to look it up on Google.


 * There is still a glitch not patched yet that allows players to say some curse words if they say at (swear) point. This also works for every drug name accept cocaine. This trick also can bypass offsite links.


 * Lots of people got annoyed that innocent words were turned into hashtags. Some words like the, or my can represent that. People also get annoyed that words unrelated to swearing were getting filtered for under 13 based users. Some words that apply are town, sucks, secret, stupid, crap. This also applies to some phrases such as "I am too".


 * People complain that other words or people's names like discord, butt, naked, nude, password, kiss, slavery, Frederick Douglass, tran, and sometimes well were getting censored no matter what age the player is and at the same time thought butt shouldn't be censored if damn isn't. While this may be true, damn is not really a 'terrible' cuss, as it's based on milder ways of speaking the terrible mouth. 13+ users sometimes complain on how limited they are on things they can say. 13+ users also complain how under 13 users can actually say hell. While this isn't a swear, it may be inappropriate at the age.

Glitches

 * In early 2017 (around February; March), some users were able to say the words "ass" and "nigga", getting passed the filter towards everyone else.

Players say this glitch was caused by Roblox whitelisting usernames, which were the words used here. These usernames are now terminated, patching the glitch.
 * In mid 2017, the chat filter was claimed to be completely messed up. It acted a lot like the 2013-2016 filter, until it was updated. This made everyone able to say lots of things like ass or piss. There was a time that at rare accasions you could even say "shit", but this has been patched during this time. "Fuck" got passed the filter if a player was to add a symbol at the start or ending of it. This was later patched, just like shit was. However, players could easily say shiit or shjt to get around this. Players could say fuu.ck or fu.ck to bypass the F word.


 * In late 2017 - early 2018, there was a glitch that allowed players to say "dick" if they said anything with "ken" or "ngen" in it. Examples (warning profanity): "longen my dick daddy", "I wanna thunderstriken my big fat dick". For some users, you could actually just say dick without anything in it, but this was very rare. "Big fat dick" was not censored for a while as well.


 * Starting April 2018, some players were able to say more words that others couldn't say. These words are "cum", "rape", "hitler", "retard", "cok", "kkk", and "queer". This glitch has been patched in mid-june of 2018.


 * Some phrases are able to get passed the filter. Some like "earth porn", "moby dick", "suck a dick, clark", "hey sexy/hi sexy", "EATShit", "it's fucking good", "rape/cum me/my daddy/dad/mom/mommy", and "fuck isis" show a good example. Surprisingly, these actually worked for <13 users.


 * Ever since the new 2017 filter, everyone's filter is very buggy and sometimes appears as if a word that is only 4 letters long could turn into 17 hashtags. This glitch has not been patched yet.