The Language does not change in the ASP.NET Core Web application

Question

I follow the Globalization and localization and Building simple multilingual ASP.NET Core website tutorials to add a language switch for my application.

So, I create

Answer 1

Did you add javascript to make the language selector postback?

(function () {
$("#selectLanguage select").change(function () {
    $(this).parent().submit();
});
}());

Did you wire up therequest localization middleware in Configure?

var locOptions= app.ApplicationServices.GetService>();
app.UseRequestLocalization(locOptions.Value);

Did you add a method in HomeController like this:

[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);
}