Based on Steam´s most popular countries, I made a pack of flags. Drop one in your mods folder and it will replace Brazil´s flag.

It includes 31 flags:

Argentina
Austria
Belgium
Bulgaria
Chile
China
Colombia
Denmark
ElSalvador
Finland
Greece
Hungary
Israel
Italy
Lithuania
Netherlands
NewZealand
Niger
Norway
Paraguay
Peru
Poland
Portugal
Russia
Singapore
SouthKorea
Switzerland
Taiwan
Ukraine
Uruguay
Venezuela