Who are growing faster in Peru, Bolivia, and Ecuador?
Who are growing faster in Peru, Bolivia, and Ecuador? Amerindians(Quechua and Aymara speakers) or Hispanics(Spanish speakers)?
When new generations arrive in Peru, Bolivia, and Ecuador which language would they eventually pick?
From what I've heard from here and in some news articles, it's Quechua. Remember that Spanish is not the native language of the general masses of the Amerindians in Peru, Bolivia, and Ecuador. There are more Quechua and Aymara speakers and Quechua and Aymara would overcome Spanish.
Check pages in the "Barcelona vs Spanish" and "The Presence of Mandarin in Spanish Business" threads. It has a bunch of info and studies about the trends of Spanish.
It can be. Anyway, when a Quechua speakers want to to speak to an Aymara speaker they will need to use Spanish.