I don't think that map is accurate enough. There are 6 languages in spain (spanish, catalonian, valenciano, galego, asturiano and euskera, 4 in switzerland and just one in portugal... and i see no diffference between country's real sizes and depending-upon-number-of spoken-languages sizes. Not to mention the 7 or 8 languages spoken in Venezuela, kind of 20 in brazil an so on.