Como se dice?

Words escape them:

MADRID - Spain has embarked on a thorny path toward trying to set words to a so far lyric-free national anthem.

The wordless Spanish national anthem has often caused consternation among onlookers from other nations at international events like soccer matches and Olympic games because all Spaniards can do is hum along to its tune.

''It gives me a very odd feeling that people should sing 'La, la, la, or chunda, chunda, chunda,''' said Alejandro Blanco, president of Spain's Olympic Committee.