What's the adjective for prestigious? Here's the word you're looking for.
prestige
(sociolinguistics, of a linguistic form) Regarded as relatively prestigious; often, considered the standard language or language variety, or a part of such a variety.
“The house itself is located in one of the most prestigious housing estates in the county.”
“By this time, his prestigious career was at its height and he was constantly returning from pilgrimages across the globe as an invited honoree of one sort or another.”
“The company runs the Peninsula Hotel, one of the most prestigious hotels in the world.”