dialectal

/ˌdaɪəˈlektl/
belonging to or characteristic of a dialect; "dialectal variation"

adjective [原级]方言的;乡音的

But this doesn't mean written Chinese is pan-dialectal.
然而,这并不意味着可以将汉字称为泛方言语言。

dialectal

-al ⌜ 表示具有某种性质的 - indicating pertaining to or characterized by ~ ⌟
单词造句:
网友用“Dialectal”造句精选
This fact means there are some relations between Hakka dialectal groups and Gan dialectal groups. 这一事实表明:客家方言群与赣方言群在历史上曾有着密切的关联。
He obsessively asked friends and fellow scholars which dialectal words would be most widely understood. 他痴迷于询问朋友及共事的学者哪些方言词汇才是最广为人知的。