answer:You’re asking two separate questions. 1. Were there ever Spanish slaves in the Caribbean? Yes you bet your bottom dollar there were. Why do you think they speak Spanish? A long time ago, a Pope, I’m not sure which I forget these things, well he split the “New World” into two. The northern hemisphere for Spain and the Southern for Portugal (Yes Portugal was once a world power) So yes Spain conquered the Carribean sea as well. 2. You asked if Spaniards were ever slaves themselves. Well kinda? They had the Spanish Nobility, so I guess you can say the lower class were their slaves? As they were forced to serve Spain in anyway shape or form. Oh and here’s the “Splitting Treaty” that I mentioned earlier by the Pope it’s called, Treaty of Tordesillas Don’t take Wikipedia at facevalue, yea I linked it but there are hundres of thousands of books in regards to Spanish history. Every major empire has. :]