"Today we are eating Azerbaijani food."
Translation:Bugün Azeri yemeği yiyoruz.
Nation names function as both adjectives and nouns. When referring to people we use it like adjective but when referring to the inanimate objects we use them as nouns.
Azeri adam. - Azerbaijani man (adjective + noun)
Azeri yemeği - Azerbaijani food (noun + noun -> compound noon)