Is Spanish more useful than Portuguese in Latin America?

Here you have an interesting southamerica political evolution since 1700

http://upload.wikimedia.org/wikipedia/commons/4/42/Non-Native_American_Nations_Control_over_South_America_1700_and_on.gif

Too much wars... it penalty human and countries developement.

Evinoria, is there any political nationalist feeling/party in old Juliana and Rioplatensis republic at present Brazil?

Brazil desperately needs a revolution.