multidialectal       
adjective  language specialized (also multi-dialectal) uk/ˌmʌl.ti.daɪ.əˈlek.təl/ us/ˌmʌl.ti.daɪ.əˈlek.təl/ /ˌmʌl.taɪ.daɪ.əˈlek.təl/
 多方言的
using more than one dialect (= a form of a language that people speak in a particular area)
  a multi-dialectal environment 一个多方言环境 
 It is difficult for newcomers to adapt to the multilingual and multidialectal nature of US society. 对于新来者,要适应美国社会多语言和多方言的本质特点很困难。 
 - More examples
 - English as a spoken lingua franca will be a multidialectal one.
 - This suggests that multi-dialectal input results in relaxed and broadened phonetic categories.
 - Multidialectal competence is key to allowing you to understand and switch between diverse varieties of English.
 - Multidialectal infants hear multiple dialects of a single native language if one or both of their parents speak with a dialect that differs from the surrounding locality.