This is the 9964th most frequent Spanish word.
búlgaro
"Búlgaro" means "Bulgarian" (relating to Bulgaria or its people).
Here, 'búlgaro' is used as a noun to refer to the Bulgarian language.
El búlgaro es un idioma que se habla en Bulgaria.
Bulgarian is a language spoken in Bulgaria.
In this sentence, 'búlgaro' functions as an adjective, describing the team originating from Bulgaria.
El equipo búlgaro ganó el partido ayer.
The Bulgarian team won the match yesterday.
Here, 'búlgaro' is used as a noun to refer to a male individual from Bulgaria.