This whole topic is about racism. Someone who answers either is being racistic, wheather they like it or not.
In truth, most hacks are bad, and a lot of them are english. But there's NO way that you can say spanish, because that's forgetting the great things hackers such as Coolboyman (like it or not, Brown was possibly the first "Good" hack, that was back in the early 2000s.) or Zel (who really started the ball with hacking, along with the spanish Baro)
It all depends on the hacker. A good hacker goes over their work and makes sure it is good. Examples? Coolboyman, Zel, Baro (If it weren't for the sprites, Quartz would be brilliant), Destindjagold, Miksy91... there are also some newer ones who might become good, but haven't yet. And then there are the "Oooh, squirtle's in route 101, let's call it 'Awesomeruby'!" Now, it isn't as bad as Mario world hacks, but still...
But that doesn't mean that all bad hacks are from bad hackers. Miksy91, for example, started out with the buggy and odd Crystal World. CBM had Fukumon. You have to learn from your mistakes, learn how to make good mapping, spriting, story, ect.
So in the end? The hacker is the determining factor.