I am a Spanish major, and am not qualified to say much yet, as my Spanish is still fledgling, but I did understand a fair bit of it.

I am a novice poet, but perhaps I can critique anyway? The word "inspiras" confuses me... I may be missing a meaning of it, but perhaps it should be "aspiras"? Also, I am not sure about the word "sombres." Other than that, I believe that yes, the Spanish does add a great deal to it. It brings forth the spirit of the country, which makes me happy. I know just the tiniest bit of Colombia, but I believe you have captured it beautifully.

As for the repetition, I believe you have just the right amount. In no way is it overdone, but as it is, it gives the piece a feeling of longing and grows the image of her disquiet, as in por el mar, por la sal del mar and bloated to inflamados.

As for your definition, I love how you've applied it to Colombia! I can easily see how Colombia would be a sea lion ever clumsy in her awkward cities, but longs to release herself in the quiet or vicious beauty of the sea. I wish I could say something more intelligent, but alas!

The only part I am on the fence about is the ending. I know my first few reads I found it weak, but the more I read it, the more I came to understand it and loved it. I only use that to explain why I mark off on impact - though that may be just my little foible.