http://www.apple.com/es/support/
Here is the Apple website for Spain. I was able to find iPad manuals very quickly but not for the Apple watch.
Navigating a Chinese website is beyond me but not one in Spanish
And here is the Apple Store Website for Spain. . . notice something missing? The ability to order the Apple Watch. Apple has yet to offer the Apple Watch for sale in Spain. You cannot order the Apple Watch on the Apple Store in Spain. You can only get "Más Información" about the Apple Watch.
They won't be posting the Apple Watch Manual in España for quite some time. Sorry. Good try.
You keep dancing, DennisW, but you are getting there, slowly but surely. You've discovered there are foreign language Apple Websites, with Foreign Language manuals.
You might want to look at this: