It was originally a Portuguese colony but most people speak French because it is surrounded by French speaking countries. 
 I can't tell you that but I can tell you that Portuguese Guinea became independent in 1973 and then added Bissau to its name because there was another country already called Guinea. 
 Wow, that's larger than I was thinking. What can you tell me about society? 
 I don't know that but Portuguese this still the only official language. 
 What else can you tell me about that?
It was originally a Portuguese colony but most people speak French because it is surrounded by French speaking countries.