"Sunt românești."

Translation: They are Romanian.

[EQKaspian]

"Sunt românești" is "They are Romanian," because "românești" is the plural form of the adjective.

In order to be "I am Romanian," it would have to say, "Sunt românesc," (for a male speaker) or "Sunt românească" (for a female speaker).

[JulioCesar13.ro]

I'm romanian is Sunt român for man and sunt româncă for female. românesc or românească is used to refer to things exemplu: the car is romanian, mașina e românească.

[edwardlr4]

I hear tromânești in slow version especially.