|It would seem littering is polycultural problem|
(photo by Shirokazan)
Adjective. Mid-20th century.
[from BI- + DIALECTAL.]
Fluent in the use of two dialects of the same language, involving
the use of two dialects, especially a standard and a non-standard variety.
I must admit to finding this skill thoroughly fascinating, as solidly stuck as I am in my monoaccented and unidialectical state. If you're bidialectical, or have any thoughts on bidialecticalism in general, please comment below.