I added new Rosource file UserNotification.resx. Then I added two files for localization and named it UserNotification.hr-HR.resx and UserNotification.sl-SI.resx. (followed thread: How to use localization in C#)
Then I changed Windows language's to "si". If i print current culture using System.Globalization.CultureInfo.CurrentCulture.ToString()
the output si sl-SI
But, I allways get a string from UserNotification.resx. Seams it doesn't recognizes the localization resource files.