I'm just curious, are there any good practices on how to handle adding (and populating) a new language to a site without allowing the public to view it?

There is no flag except the "Enabled" flag in the edit language view, which has to be enabled for editors to be able to access the language in the language dropdown in the Edit view, and at the same time, there is no way to figure out what langauges to show or not using just the language functionality.

So, basicly I want the whole langaugebranch to be created and previewed in the Edit mode, and when I'm happy I just change the Enabled flag for the language to put it "live".

Any suggestions? I have some ideas, but I'm hoping there is actually a proper way of doing this.