You know very well that a lot of people in Brazil have really bad english and even though they might be able to read some english pages they are going to have a hard time asking SO questions.
How would you know that? Not every Portuguese speaking user here in from Brazil, and as one of them, frankly I don't have any idea of the English proficiency of Brazilian programmers.
Well, there is a good chance he is Brazilian since we are so numerous and yes, lots of people here do speak and write english very badly, even in the programmer community. Its actually a pretty big problem. But even if he were from Portugal I would also guess he should be aware of that (and I imagine the english speaking problem is not going to be better in Angola or Mozambique)
I have a feeling this is more about Google results getting worse really fast when you don't have a lot of relevant content. For example, I don't remember the last time I clicked or even saw those fake generated pages on English Google, yet every time I search for something in Portuguese those show up.