The condemnation of vernacular language as vulgar and ungodly was part of the Catholic Church’s historic argument on behalf of Latin as the only acceptable written language. As spoken languages, such as English, gained literary legitimacy, this attitude changed, but, to many minds, the peculiarities of lower-class vernaculars continued to be a ark of inferiority and the subject of ridicule. To a large extent, this view continues today. The perceived mangling of proper language is a tenacious aspect of derogatory stereotyping.
Ewen & Ewen, Typecasting: On the Arts and Sciences of Human Inequality, pp. 187.