Best way to create a multilingual multisite

Hi
I am trying to set up a network of sites (a subdirectory based multisite) which I want to be available on Spanish & English. Each site will work as a sub-brand of the main brand (the main site)

I am wondering if it would be possible to build an structure as this one:

mybrand.com/es (Spanish versión of site 1 (mainsite))
mybrand.com/en (English versión of site 1 (mainsite))
mybrand.com/subbrand1/es (Spanish versión of site 2)
mybrand.com/subbrand1/en (English versión of site 2)
mybrand.com/subbrand2/es (Spanish versión of site 3)
mybrand.com/subbrand2/en (Spanish versión of site 3)

Is that possible? how can I create subdirectories based sites within sites of a multisite without having to reinstall wordpress on each of them? it means creating a multisite nested on a multisite, isn't it?

Thank you
Pablo