Separate chains might be a little bit too much decentralization. That would mean separate accounts and private keys. There wouldn't be a global Steem economy, instead it would be one big English speaking community and a lot of smaller ones.
Maybe better idea would be to adjust reward pool distribution among different languages, although I'm not sure how easy that would be.
What if the separate islands shared an underlying Economic Operating System
That might work!
would such islands achieve End Of Separation?