With total immersion it is possible to become fluent in certain language areas, especially professional work communication skills. People have proven to be capable to aqquire language structures in a short time at least my company has been successful with English.
From false beginners Spaniards have learned to be fluent in their jobs after intensive One 2 One training. It involved 3 hours a day during the week and every weekend in a hotel till 1 pm on Sundays. 3 teachers per student and total immersion. Including telephone classes in English with roleplay of work situations.
Anybody worried about his/her communication skills get a free trial class English Dutch or Spanish through skype. Call Willem at backuplines. world wide web backuplines com