I have a project where I need translated content. Therefore I use globalize3, wich stores its translated attributes in a seperate table that belongs to the original model. And I use RailsAdmin for painless record management.
It took me some time to figure out how to get those working together, but eventually I found a solution that is non invasive and still ok to work with.
In my case there is a Snippet class. It holds content for static pages or text passages on the website. There is a good README for globalize3 for installation instructions and documentation.