An adjective describes a noun.
You could potentially describe a person or thing as "Vietnamese".
The proper adjective or term for people from China is Chinese.
The correct spelling of the proper adjective and demonym is Haitian (of or from Haiti).
This could be the adjective serious, or series, or the proper noun Sirius.
That is the correct spelling of the proper adjective Arabic (also a language group).
The proper adjective (capitalized) for Puerto Rico is "Puerto Rican".
Vietnamese is the proper adjective for Vietnam.
The correct spelling of the proper adjective is Scandinavian.
The likely word is a proper noun, the country of Vietnam.
Those letters will spell the proper noun or proper adjective African.
The correct spelling of the proper noun or adjective is Portuguese.
That is the correct spelling of the proper adjective Virginian (from Virginia).
The proper adjective or term for people from China is Chinese.
The correct spelling of the proper noun or adjective is Jamaican.
The proper adjective for a person, thing, or characteristic is European (capitalized).
The correct spelling of the proper adjective and demonym is Haitian (of or from Haiti).
This could be the adjective serious, or series, or the proper noun Sirius.
The likely word is the proper adjective and demonym Chinese (of or from China).