Those in the threads here and in the DT are English or American sea songs that mention the Spanish, but are not Spanish. See thread 7339, Spanish ladies: Spanish Ladies Some discussion here.

For a very old (18th century) version of "The Spanish Lady's Love to an English Sailor," go to the Bodleian Library: Bodleian
Click on Browse/Search and enter part of the title. Look especially for Douce Ballads 3 (86a) for the copy printed by Dicey, London, 1736-1763, which is clean and readable.
I think there are other versions in the Bodleian as well. These old versions have not been posted here.

If you have some Spanish examples (in Spanish) please post for us.