non-standard speech

Từ điển WordNet v3.1 - WordNet Dictionary

noun

speech that differs from the usual accepted, easily recognizable speech of native adult members of a speech community
• Hypernyms:
speech, speech communication, spoken communication, spoken language, language,
voice communication, oral communication
• Hyponyms:
baby talk, babytalk, motherese, dialect, idiom,
accent, localism, regionalism, telegraphese, vernacular, slang,
slang, jargon, lingo, argot, patois,
slang expression, slang term