Yes, sort of.
The Spanish Constitution gives some mild and ambiguous recognition to the so called nationalities inside Spain. As a matter of fact, we have our own Parliament and our own autonomous government and we have a certain theoretical amount of self-government.
However, this purely nominal autonomy is far from the freedom that we would like for our country. Moreover, even the limited autonomy recognized by the Spanish constitution is constantly challenged by the Spanish administration: government, parliament, supreme court, etc.
In spite of our "autonomy", we live in economic stringency, political submission and cultural contempt.