Fandom of Two!

Press Gang fic, for the 15minuteficlets challenge #67 ( I think)
( Spike/Lynda fic, the title of which gives away the word )

Question....

... or more a request actually. Needing a word for a fic, and I'm hoping someone on my friends list can help me out.

Lullaby, in Spanish?

I did a check on Babelfish, but since I know how untrustworthy that thing can be, I'm seeking experts before I title and post a fic!