I don't think so, Portugal the country might be small, with a small population, but there is ~250 million "Lusophones" (native Portuguese speakers), making it the fifth-most spoken native language in the world, I'd hardly call that small :) And before everyone screams; yes, European Portuguese is different from Brazilian Portuguese, but they're still both Portuguese and understand each other, so it's not like the text from one cannot be used to train a model for the other, or vice-versa.
All in all, I don't think that's a major issue here.
All in all, I don't think that's a major issue here.