The writer chose to use many vernacular expressions in his essay. Vernacular means

Blasphemous means sacrilegious against God or sacred things, which is not relevant to the term vernacular. Vernacular language refers to the common or everyday language used by people, and does not imply any form of disrespect or sacrilege.

Ludicrous means so foolish, unreasonable, or out of place as to be amusing. This does not align with the definition of vernacular. Vernacular expressions are not inherently absurd or ridiculous; they are simply the everyday language used by ordinary people.

Ribald refers to speech or behavior that is humorous in a vulgar or indecent way. However, vernacular does not carry this specific connotation. While some vernacular expressions may be crude or coarse, the term itself does not denote humor or vulgarity. It refers to the common, everyday language used by people, regardless of its level of propriety.