Localization support .NET 5 PiranhaCMS

[hainguyen0011]

I'm new to this CMS library. I'm using .NET 5 and doing the localization. I write some code to change the culture like:

            CultureInfo ci = new(culture);
            CultureInfo.DefaultThreadCurrentCulture = ci;
            CultureInfo.DefaultThreadCurrentUICulture = ci;

It worked when I use my resources files "resources.en-US.resx" or "resources.vi-VN.resx" (I set new supported CultureInfo "en-US" and "vi-VN") but when I change resources files in Piranha.Manager.Localization from "General.vi.resx" to "General.vi-VN.resx"(for matching the culture format) it did not work anymore.
And if I set new supported CultureInfo to "en" and "vi" (for matching with resources files in Piranha.Manager.Localization) it still not works.

services.Configure<RequestLocalizationOptions>(
                opt =>
                {
                    var supportedCultres = new List<CultureInfo>
                    {
                        new CultureInfo("en"),
                        new CultureInfo("vi")
                    };
                    opt.DefaultRequestCulture = new RequestCulture("en");
                    opt.SupportedCultures = supportedCultres;
                    opt.SupportedUICultures = supportedCultres;
                });

I don't know what I'm doing is right way to setup localization for piranha or not? I can't find any tutorial for that.
Can you help me for localization for PiranhaCMS?
I really appreciate that.
Best Regard