Hi Franco!
Great to hear about your project.
We would strongly discourage using RACHEL-Pi for any actual deployment. In addition to what you mention, it does not have the same reliability you would need for an actual field deployment.
Which blog did you see about a new release? We may have new product in the middle of this year, but I don’t think it’s on any blogs yet so I want to see what you’re seeing.
It’s good to have an extra device for training and troubleshooting help of your deployment.
We do have some limited content in the languages you’re asking about, though you’ll need the RACHEL-Plus to get that content (http://oer2go.org)
When you purchase at http://store.worldpossible.org be sure to enter the promo code and your EIN at check-out.
Our Guatemala team has produced a Spanish language MOOC on deploying RACHEL which we are currently translating. I also try to keep some best practices here: Deployment Wiki (Start Here)
Best,
Jeremy