Does that equal to "I have Spanish blood (In mir fließt spanisches Blut)?
No. This is clearly water, not blood. Makes no sense at all.
Blood is "vér" in Hungarian.
(And blood in English is also "blood", not "water" :) )
So it`s a person who drank water from Spain?
Your guess is as good as anyone's. :)
Drinking Sangria from buckets on Mallorca.
A fine German tradition, reaching back decades. :I