There were translators etc. - the normal player treatment. But Breno somehow was a special case. It is a difference if a Roque Santa Cruz (just to take somebody that came directly from South America young) - good educated with language skills out of a middle class home and eager to get to know foreign countries comes to Germany - or if it is a guy that lacks this education and only comes for the football. They were about the same age when they came. Roque had fun from the start. For others it is a foreign country, with cold weather, the people and customs are strange and they hide in their families and do not have other contacts. It they are in the group of players doing normal training sessions, going on trips with them they will be able to adapt easily - Breno was somehow out of the group with his injuries. And their was not Brazilian but Lucio (and he left in 2009) who was living his own live.
Breno was a story that totally ran wrong. A very instabile young men in a foreign world. Bayern did not have the Brazilians anymore in the team they had before. He was in an injury crisis. The normal "treatment" (help with all the paper work, finding house and furniture etc., translator and German classes) was just not enough here and Bayern did not have a "caretaking" system like Leverkusen has it for his South Americans. I blame Bayern a little that they did not really remarked what happened with Breno. He was out of the team and because of his long time injury they did not really count with him anymore. They did a lot after the fire.
Apart from Roque and Demichelis - and Breno - Bayern usually had South Americans that already were accustomed to Germany before. And with them it worked great.