Social dialect

“social dialect” or “sociolect” is a variety of speech associated with a particular social class or occupational group within a society
“sociolect” is the alignment of a set of language structures with the social position of a group in a status hierarchy

Charleston, South Carolina
New York City
the absence of [r] in words such as bear and court
aristocratic, high-status groups
the absence of [r] in words such as bear and court
working-class, low-status groups

Sociolect refers to unique linguistic markers that show a person's place within a certain social group, and concomitantly the place that social group takes within the larger society

African American Vernacular English (AAVE)
dat day – that day
dis house – this house
‘We comin’ – We're coming
No way no girl can't wear no platform shoes to no amusement park - There is no way that any girl can wear platform shoes to an amusement park
It ain't no food here -There is no food here
It don't all be her fault - It isn't always her fault
They be fightin - They are always fighting,
He come tellin me some story - He told me a lie
They come comin in here like they own de place - They came in here like they owned the place.
I like to die(d) - I almost died
He like to hit his head on that branch – He almost hit his head on that branch.

Cryptophasia is a phenomenon of a language developed by twins (identical or fraternal) that only the two children could understand.

LOLspeak (where LOL is an acronym for laugh out loud) is a variety of English that can be described as the human interpretation of how cats might speak English if they could.
Ceiling Cat blessinz apwn yu, srsly.
Ceiling Cat blessings apawn you, seriously.
Dat wood bee awsoem, srsly dued!
That would be awesome, seriously dude!
Nao, it’z almost like a sekund lanjuaje
Now, it’s almost like a second language
lolspeak iz difehcualt too lern, an yu noe itt.
lolspeak is difficult to learn, and you know it.