Emily,

Thanks for posting this song. It has such a beautiful melody; I hope somone posts that too.

I know formal, schoolboy Spanish, but no colloquialisms, so if this song has 'em I'm sunk. The last verse you quote, however, could be translated as

They all call me the Dark One, the Weeping Woman
Dark but caring...
I am like a green chili,
biting but stern...

Hope this helps.

Doug