i looked in the
\NopCommerceStore\Administration\Modules\LanguageInfo.ascx.cs
In the Import Event of the XML file, the function reads the whole file with the stream reader:
Normal Code:
using (StreamReader sr = new StreamReader(importResourcesFile.InputStream)
I changed it to:
using (StreamReader sr = new StreamReader(importResourcesFile.InputStream, Encoding.Default))
so it works !!!
Is it a bug? Whats in the future, must i always change these function?