Проблема с локализацией ASP.NET Core MVC приложения

Question

В файле Program.cs содержится следующее:

using Project.Data;
using Project.Models;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Localization;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Options;
using System.Globalization;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
var connectionString = builder.Configuration.GetConnectionString("DefaultConnection");
builder.Services.AddDbContext<ApplicationDbContext>(options =>
    options.UseSqlServer(connectionString));
builder.Services.AddDatabaseDeveloperPageExceptionFilter();

builder.Services.AddDefaultIdentity<IdentityUser>(options => options.SignIn.RequireConfirmedAccount = true)
    .AddEntityFrameworkStores<ApplicationDbContext>();
builder.Services.AddLocalization(options => options.ResourcesPath = "Resources");

builder.Services.AddControllersWithViews()
    .AddMvcLocalization();
var app = builder.Build();

var supportedCultures = new[]
{
    new CultureInfo("ru"),
    new CultureInfo("en")
};
app.UseRequestLocalization(new RequestLocalizationOptions()
{
    DefaultRequestCulture = new RequestCulture("ru"),
    SupportedCultures = supportedCultures,
    SupportedUICultures = supportedCultures
});

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseMigrationsEndPoint();
}
else
{
    app.UseExceptionHandler("/Home/Error");
    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
    app.UseHsts();
}

app.UseHttpsRedirection();
app.UseStaticFiles();

app.UseRouting();

app.UseAuthentication();
app.UseAuthorization();
app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}");
app.MapRazorPages();
app.Run();

Также у меня есть контроллер Home:

public class HomeController : Controller
    {
        private readonly IStringLocalizer<HomeController> _localizer;

        private readonly ILogger<HomeController> _logger;

        public HomeController(ILogger<HomeController> logger, IStringLocalizer<HomeController> localizer)
        {
            _logger = logger;
            _localizer = localizer;
        }

        public IActionResult Index()
        {
            return View();
        }

        [HttpPost]
        public IActionResult SetLanguage(string culture, string returnUrl)
        {
            Response.Cookies.Append(
                CookieRequestCultureProvider.DefaultCookieName,
                CookieRequestCultureProvider.MakeCookieValue(new RequestCulture(culture)),
                new CookieOptions { Expires = DateTimeOffset.UtcNow.AddYears(1) }
            );

            return LocalRedirect(returnUrl);
        }

        public IActionResult Privacy()
        {
            return View();
        }

        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public IActionResult Error()
        {
            return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
        }
    }

И частичное представление _SetLanguagePartial для выбора локализации:

@using Microsoft.AspNetCore.Builder
@using Microsoft.AspNetCore.Http.Features
@using Microsoft.AspNetCore.Localization
@using Microsoft.AspNetCore.Mvc.Localization
@using Microsoft.Extensions.Options

@inject IViewLocalizer Localizer
@inject IOptions<RequestLocalizationOptions> LocOptions

@{
    var requestCulture = Context.Features.Get<IRequestCultureFeature>();
    var cultureItems = LocOptions.Value.SupportedUICultures
        .Select(c => new SelectListItem { Value = c.Name, Text = c.DisplayName })
        .ToList();
    var returnUrl = string.IsNullOrEmpty(Context.Request.Path) ? "~/" : $"~{Context.Request.Path.Value}";
}

<div>
    <form id="selectLanguage" asp-controller="Home"
          asp-action="SetLanguage" asp-route-returnUrl="@returnUrl"
          method="post" class="form-horizontal" role="form">
        <label asp-for="@requestCulture.RequestCulture.UICulture.Name">Язык:</label>
        <select name="culture"
                onchange="this.form.submit();"
                asp-for="@requestCulture.RequestCulture.UICulture.Name" asp-items="cultureItems">
        </select>
    </form>
</div>

Проблема в том, что при запуске проекта открывается его английская версия, а список поддерживаемых языков состоит только из одного элемента: английского, хотя я вроде задал в RequestLocalizationOptions дефолтным русский язык, а поддерживаемыми языками русский и английский. Как это пофиксить?

БЛОГ НА HUSL

Проблема с локализацией ASP.NET Core MVC приложения

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