dialect

noun6

1. •
   A lect (often a regional or minority language) as part of a group or family of languages, especially if they are viewed as a single language, or if contrasted with a standardized idiom that is considered the 'true' form of the language (for example, Bavarian as contrasted with Standard German).

   • Comparative wordlists of two dialects of Yoruba with Igala. — 2007
2. •
   A variety of a language that is characteristic of a particular area, community, or social group, differing from other varieties of the same language in relatively minor ways as regards grammar, phonology, and lexicon.

   • And in addition, many dialects of English make no morphological distinction between Adjectives and Adverbs, and thus use Adjectives in contexts where the standard language requires -ly Adverbs — 1988
3. •
   A variant of a non-standardized programming language.

   • Home computers in the 1980s had many incompatible dialects of BASIC.
4. •
   A variant form of the vocalizations of a bird species restricted to a certain area or population.
5. •
   (offensive) Language that is perceived as substandard or wrong.

   • Well, those children don't speak dialect, not in this school. Maybe in the public schools, but not here. — 1975
6. •
   (informal, offensive) A language existing only in an oral or non-standardized form, especially a language spoken in a developing country or an isolated region.