I'm sure this question has an extremely simple answer, but I'm comparing the dialects from two movies, one being a typical Hollywood movie, and one being a documentary. I am listing any linguistic difference from Standard English into their categories so that I can compare the two.
Currently I'm focusing on differences in Phonetics, Syntax and Vocabulary. However, I noticed that one of the dialects uses informal contractions (whaddya, whatcha, ain't, oughta, outta) very frequently and was wondering what category they would fit into.