fsx deluxe

Hello everyone. I just bought FSX Deluexe in Argentina. I read in some place (not MS) that the Deluxe version was going to give me the choice to install it in english or spanish but it only installs it in Spanish. Is there any way to change it to ...

Hola, me quiero comprar la expansion "Acceleration" para FSX, pero tengo FSX Deluxe en Español, y solo consigo Acceleration en ingles, alguien sabe si funciona igual?, voy a tener algun problema?. Gracias!.