The victims of yesterday's crash, all aged between 19 and 25, also included a Romanian, a Frenchwoman, an Austrian and a student from Uzbekistan, Jordi Jane, who heads up interior matters for Catalonia, said on the radio.
"Some of them were not wearing seat belts," Jane said.
The bus was carrying students from about 20 countries, many of them on a European exchange programme in Catalonia.
Dozens were injured when the driver lost control of the coach and crashed into an oncoming car near the small town of Freginals as the group returned from a festival.
The accident occurred about 150 kilometres south of Barcelona as the students were returning from the Fallas festival in eastern Valencia, known for the burning of giant statues.