Not loading localized string using ResourceManager in DNX 4.5.1

Question

I'm trying to add localization to my DNX 4.5.1 project in Visual studio 2015. I have two resx files..

Culture.resx
Culture.sv.resx

Both as embedded by setting resource in project.json

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

I create the 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 however try to get the Swedish value I just continue getting the default value.

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

Is there some problem with the satellite assemblies being created for the non default languages?