You need to download the resource manager, and if you need resources for a specific language, you will need to ask them to use a specific culture using:
GetObject(String, CultureInfo)
You can create the culture you need:
new CultureInfo(string name)
or
CultureInfo.CreateSpecificCulture(string name)
or
CultureInfo.GetCultureInfo(string name)
- : "en" English, "de" German... : culture