Is he Don Quixote? :)
Can we exclude op, to make it "rides a horse"?
Apparently not, you just say it the same way.
"The Spaniard rides a horse" is accepted (2018-09-03)
Could this sentence mean "The Spaniard horseback rides?" or does it mean that he is quite literally riding on a horse, and 'horseback riding' as an activity itself has another term?
I think 'horseback riding' translates to paardrijden, but I'm not sure.
Please, Duo, stop using the English word "Spaniard". It's the kind of word ones racist uncle would use at the dinner table, while everyone else cringes.
What? How exactly?