https://www.worldatlas.com/articles/what-is-a-vernacular-language-how-is-it-different-from-a-lingua-franca.html
What Is A Vernacular Language? How Is It Different From A Lingua Franca?
A vernacular language is the native language of a specific population living within the country.
what isvernacular languagedifferent from
https://archive.org/details/chineseenglish00doug/page/612/mode/2up
Chinese-English dictionary of the vernacular or spoken language of Amoy : with the principal...
Appendix: Supplement to dictionary of the Amoy colloquial language / Thomas Barclay. Shanghai : Commercial Press, 1923
chinese englishof the