vernacular vs dekko

vernacular and dekko both are nouns.

Word	Noun	Adjective	Verb	Adverb
vernacular	Yes	Yes	No	No
dekko	Yes	No	No	No

vernacular (noun)	dekko (noun)
the everyday speech of the people (as distinguished from literary language)	British slang for a look
a characteristic language of a particular group (as among thieves)

vernacular (adjective)	dekko (adjective)
being or characteristic of or appropriate to everyday language