vernacular

Adjective

• being or characteristic of or appropriate to everyday language
  • common parlance
    
  • a vernacular term
    
  • vernacular speakers
    
  • the vulgar tongue of the masses
    
  • the technical and vulgar names for an animal species
    

Noun

• the everyday speech of the people (as distinguished from literary language)

• a characteristic language of a particular group (as among thieves)
  • they don't speak our lingo
    

Related words

• Synonyms: 
  common , vulgar , slang , cant , jargon , lingo , argot , patois