Dialects in media - a Danish example

This article in the Copenhagen Post caught my eye because I spent 6 weeks in Denmark a few years ago -- specifically in Aalborg, Jutland.  (The lighthouse in my icon is in Jutland.) 
http://www.cphpost.dk/culture/culture/51361-in-the-cartoon-world-if-theyre-dumb-theyre-from-jutland.html

It talks about how movies generally use "standard" Danish for the hero/heroine, and dialect for the "dumb one" or the crazy side-kick.  This practice is certainly common in US movies too -- think of how often the goofball has a southern drawl or a heavy Bronx accent.  (One reason I enjoyed "Princess & the Frog" is that pretty much everyone had a non-standard accent...fun.) 

My French isn't really good enough to be sure, but it's an issue in French films too,right?  What about other cultures?