The aim of this final thesis is to recognize the main topics discussed in the Parliament of Catalonia during the legislatures IX and X. The importance of independence issue was compared to other topics, dierentiating between political parties and legislatures. The interventions of each deputy were extracted from the transcriptions of each Parliament session, with which a frequency matrix between interventions and words was created. The methodology used was Correspondence Analysis, clustering and Latent Dirichlet Allocation.