I would love a world where most people can communicate with everybody regardless of "native" tongue and that would prolly lead to a new golden era of mankind in creative and humanitarian areas. Not so much in science I suppose. They already talk to each other fine. The trend certainly seems to be english taking over. Which is fine since it is such an expressive language beatutiful in ways. All other major langs will probably remain and you guys will look kind of silly only knowing the "global" language but in time latin american culture will catch up with you and spanish and potrugeese will be your second lanugages. Maby they already are?