Do not load localized string using ResourceManager in DNX 4.5.1

Question

I am trying to add localization to a DNX 4.5.1 project in Visual studio 2015. I have two resx .

 Culture.resx Culture.sv.resx 

Both are inline by setting resource in project.json

 "resource": "**\\*.resx" 

I am creating a ResourceManager .

 var resourceManager = new ResourceManager("Core.Culture", typeof(CultureManager).Assembly); 

And try to get a localized string. This gives me the value from Culture.resx as expected.

 var result = resourceManager.GetString("Test1"); 

If I try to get the value in Sweden, I just keep getting the default value.

 var result = resourceManager.GetString("Test1", new CultureInfo("sv-SE")); 

Is there any problem with creating satellite assemblies for non-standard languages?