During our last visit, my daughters (11 and 5 then) and I were close to finishing our lunch at Norway's Akershus when a very loud group of Brazilian young folks stormed in. They took over two tables in the main dining area, about 10 feet from us. Even though most tables near them were occupied, they continued to be extremely loud. They were speaking in Portuguese, of course. I speak Spanish and have had many contacts with Brazilians, many of whom also speak Spanish. I am accustomed to the Portuguese accent and pronunciation, so since Spanish and Portuguese are so similar, I could understand most of what they were saying. Although I am not easily ruffled, especially by "earthy" language, this group was exceedingly vulgar -- and even though my girls didn't understand a word, I was offended by the fact that the Brazilians were so vulgar in front of my children. I was getting very close to confronting them when our waitress, Hanna, came up and, in a somewhat loud voice herself, apologized to us for the "extreme rudeness" we were exposed to. She offered us free dessert. A manager or supervisor came from the area behind the buffet display and also apologized to us, then went to other tables to apologize. Another manager went to the Brazilians' tables and in a very calm voice asked them to either become very quiet and "civilized" or he would ask them to leave. One of them protested in English that they had "reservations." He quitely replied that they had reservations only as long as he permitted them to have reservations, and that if they wanted to maintain their reservations, they would "act in a mature fashion." When he said that, many of the other tables, including mine, applauded him. Point well made. The offenders noisily rose and left, hurling vulgar insults all around. The cast members and supervisors again made quiet rounds apologizing. I have heard/read elsewhere that the "Brazil problem" is one of long-standing duration at WDW. However, I saw other groups of Brazilians in other venues, but nothing like this mess.
Yes, we too, on several occassions have run into these groups of young people from brazil. For the most part, we have found them to be exeptionally rude and nasty. If you say something to them, they give you this "no speak english" line, and walk away laughing. 

LOL
Well it was. and I am not embellishing this.........Shoulder to shoulder, and the CM's just kept moving everyone closer together.Well two college age boys are right next to me. With those giant beer flasks. They shut off the lights, Give the whole speech about staying put. Security was very tight by the way. This kid starts pukeing. All over his shoes, my shoes, and I can not move an inch. A woman in front of him gets puked on, And in her very proper English accent, Is yelling to her DH, My god, Joe I have been vomited on. I have Vomit all over me. The vomiter just stood still and let it all out.