If you know Spanish, you might be interested in going to Spain to talk to locals and practice. While this will work out great for you in most places, especially Madrid, if you want to venture out to other regions you might not be in such good luck.
Although everyone in Spain speaks Spanish, you won’t necessarily hear them speaking it out on the street or in cafes. This is because there are many other official and unofficial languages in Spain, some that couldn’t be farther from Spanish.
For example, in Basque Country and parts of Navarre Basque is spoken, called Euskera in their native tongue. But, not even just one version of Euskera is spoken!
Throughout the regions, there is variation in many of the words so even then it can be difficult.
If you go across to country to the northwest region called Galicia, you can enjoy amazing seafood and hear their native tongue, Galician, or Galego.
In newer cities like Vigo, you won’t find it as often, but in the popular tourist town of Santiago de Compostela, you will find almost everyone exclusively speaking in Galego.
So make sure before you visit you brush up on tour Spanish and try to learn some basics of the other languages as well!