Nancy has localization built into it.
So if culture is
de-DE it will look for a view called
Home-de-DE, which you can then add your localized content.
It will also use resx files eg.
Text.de-DE.resx (but can be overridden to be a database or whatever) to get translations out so you can in your view call
@Text.Greeting and it will find the relevant item.
Here is a Razor demo showing Localization