To confirm I was able to install iOS 10 beta and yes both the English and Spanish keyboard both work with the English setting and emoji only, puedo confirmar
AWESOME!!!!
Could you please try also this?:
On the other Hand, anyone can confirm if the multi language feature works with Siri? I mean, can I use siri in English and ask, text someone... And tell her the message in Spanish? The same when I want to play a song spelling it in another language