heteroglossia
noun
het·ero·glos·sia ˌhe-tə-rō-ˈglä-sē-ə 
-ˈglȯ-
: a diversity of voices, styles of discourse, or points of view in a literary work and especially a novel
Example Sentences
Recent Examples on the Web This example shows one kind of language at use–one part of the heteroglossia this student/speaker could have chosen to use. 
Bruce Sterling, WIRED, 6 Feb. 2007
Bruce Sterling, WIRED, 6 Feb. 2007 Word History
Etymology
New Latin, from heter- + Greek glōssa tongue, language
First Known Use
1988, in the meaning defined above