这是由于Blazor客户端的语言环境没有被正确处理而导致的。为了解决这个问题，需要在客户端的Startup.cs文件中添加以下代码：

using System.Globalization;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Localization;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

namespace BlazorApp.Client
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddLocalization(options =>
            {
                options.ResourcesPath = "Resources";
            });

            services.Configure(options =>
            {
                var supportedCultures = new[]
                {
                    new CultureInfo("en-US"),
                    new CultureInfo("fr-FR"),
                    new CultureInfo("es-ES"),
                    new CultureInfo("pt-BR"),
                    new CultureInfo("zh-CN"),
                    new CultureInfo("ja-JP"),
                    new CultureInfo("ko-KR")
                };

                options.DefaultRequestCulture = new RequestCulture("en-US");
                options.SupportedCultures = supportedCultures;
                options.SupportedUICultures = supportedCultures;
            });
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            var supportedCultures = new[]
            {
                new CultureInfo("en-US"),
                new CultureInfo("fr-FR"),
                new CultureInfo("es-ES"),
                new CultureInfo("pt-BR"),
                new CultureInfo("zh-CN"),
                new CultureInfo("ja-JP"),
                new CultureInfo("ko-KR")
            };

            app.UseRequestLocalization(new RequestLocalizationOptions
            {
                DefaultRequestCulture = new RequestCulture("en-US"),
                SupportedCultures = supportedCultures,
                SupportedUICultures = supportedCultures
            });

            if (env.IsDevelopment())
            {
                app.UseWebAssemblyDebugging();
            }

            app.UseBlazorFrameworkFiles();
            app.UseStaticFiles();

            app.UseRouting();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
                endpoints.MapFallbackToFile("index.html");
            });
        }
    }
}

然后，在项目的Resources文件夹中创建一个名为"SharedResources.xx-XX.resx"的