dialect
noun [ C or U ] language uk/ˈdaɪ.ə.lekt/ us/ˈdaɪ.ə.lekt/
C2 方言，土语，地方话
a form of a language that people speak in a particular part of a country, containing some different words and grammar, etc.
a regional dialect 地区方言
The poem is written in northern dialect. 这首诗是用北方方言写成的。
Compare: accent nounidiolectsociolect