Short observation during the rowing competition

Yesterday we had a group of WHU MBAs visiting for a rowing event and get together. As I had observed in Berlin, the Spanish speaking croud (5 to 6 people) quickly came together. I do understand Spanish fairly well, but have a bit more trouble speaking, which makes me quieter than I would usually be in a conversation in German, Portuguese or English. Besides that me being quieter might be a good thing, It made me ponder that Brazil and Brazilians would be better off if the oficial language was also Spanish. Communication, especially with our neighbours, would be so more simple, with positive effects in all fields.
Brazil stands as the biggest and only Portuguese speaking in Latin America. I wonder if the unique language has some value as a differentiating factor. I am not sure, curious to see what others think.