Yes. Under Spanish insurance contract law you have the right to choose your own lawyer and procurador in any kind of proceedings, and the lawyer you choose takes instructions from you, not from the insurer. The right does not depend on the insurer agreeing, and does not require a conflict of interest. Inside a combined home policy the legal expenses cover must appear as a separate chapter with its own premium, and the policy must state the right expressly.
Where this comes from: art. 76 d Ley 50/1980 de Contrato de Seguro, BOE consolidated text, read 2026-09-10; art. 76 c Ley 50/1980 de Contrato de Seguro, BOE consolidated text, read 2026-09-10; art. 76 f Ley 50/1980 de Contrato de Seguro, BOE consolidated text, read 2026-09-10.