That's more user friendly than just blindly reloading the page. Also include installed Template- and AssetPlugins in the check whether there's a new version or not.
The only translation that is going to be bundled with OctoPrint for now will be .de, if at all. The reason simply being that this is the only translation I can update myself and hence guarantee a good user experience for.
setup.py now offers two new commands, babel_bundle and babel_pack, with which translations for plugins and core OctoPrint can be automatically bundled or packed as language packs once compiled. This should make sharing translations quite easy in the future.
