The page I linked does tell how to set the culture to a specific culture and how to disable the use of browser language to determine culture.
Resource files are located in App_GlobalResources folder and can be edited using Visual Studio. Resource files are named according to the culture except for the English files. So the main English resource file is Resource.resx, translations will have the 2 character culture as part of the name like dutch is Resource.nl.resx
Hope it helps,