The following year , Spain entered Serrat in the Eurovision Song Contest 1968 to sing " La , la , la " , but he asked to sing it in Catalan , to which the Spanish authorities would not agree . This would be the first time he would come into conflict with the language politics of Francoist Spain , because of his decision to sing in his native Catalan language , repressed by dictator Francisco Franco . Defiantly , Serrat refused to sing the Spanish-language version , and was hurriedly replaced by Massiel , who went on to win the contest with her Spanish-language interpretation
Eurovision Song Contest 1968
Eurovision Song Contest 1968
Joan Manuel Serrat