Laravel8 Auth認証ページの表示を日本語化する

# 目的

- アプリを作成する上で基本となるCRUD処理を有したLaravelアプリをチュートリアル的に作成する方法をまとめる
- Authを用いた認証のエラーなどを日本語化する方法をまとめる

- ハードウェア環境

| 項目 | 情報 |
| --- | --- |
| OS | macOS Catalina(10.15.5) |
| ハードウェア | MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports) |
| プロセッサ | 2 GHz クアッドコアIntel Core i5 |
| メモリ | 32 GB 3733 MHz LPDDR4 |
| グラフィックス | Intel Iris Plus Graphics 1536 MB |

- ソフトウェア環境

| 項目 | 情報 | 備考 |
| --- | --- | --- |
| PHP バージョン | 7.4.8 | Homwbrewを用いて導入 |
| Laravel バージョン |  8.6.0 | commposerを用いてこちらの方法で導入→[Mac Laravelの環境構築を行う](https://qiita.com/miriwo/items/adaaaeecae69d6392e08) |
| MySQLバージョン | 8.0.19 for osx10.13 on x86_64 | Homwbrewを用いてこちらの方法で導入→[Mac HomebrewでMySQLをインストールする](https://qiita.com/miriwo/items/ef6a064bc545fbea29d9) |

# 前提条件

- 実施環境に近い環境が構築されていること。
- 筆者は下記の方法で環境構築を行った。
    - [Mac Laravelの環境構築を行う](https://qiita.com/miriwo/items/adaaaeecae69d6392e08)
    - [Mac HomebrewでMySQLをインストールする](https://qiita.com/miriwo/items/ef6a064bc545fbea29d9)

# 前提情報

- DockerやAWSなどは使用せずにMacのローカルに実施環境と同じLaravel開発環境を構築して実施する。

# この記事の読後感

- Auth認証の英語部分を日本語化することができる。

# 概要

1. 設定ファイルの修正
1. 言語設定ファイルの作成

# 詳細

1. 設定ファイルの修正
    1. laravel_crudディレクトリで下記コマンドを実行して設定ファイルを開く。

        ```terminal
        $ vi config/app.php
        ```
    1. 開いた設定ファイルを下記の様に修正する。

        ```laravel_crud/config/app.php
        <?php
        
        return [
        
            /*
            |--------------------------------------------------------------------------
            | Application Name
            |--------------------------------------------------------------------------
            |
            | This value is the name of your application. This value is used when the
            | framework needs to place the application's name in a notification or
            | any other location as required by the application or its packages.
            |
            */
        
            'name' => env('APP_NAME', 'Laravel'),
        
            /*
            |--------------------------------------------------------------------------
            | Application Environment
            |--------------------------------------------------------------------------
            |
            | This value determines the "environment" your application is currently
            | running in. This may determine how you prefer to configure various
            | services the application utilizes. Set this in your ".env" file.
            |
            */
        
            'env' => env('APP_ENV', 'production'),
        
            /*
            |--------------------------------------------------------------------------
            | Application Debug Mode
            |--------------------------------------------------------------------------
            |
            | When your application is in debug mode, detailed error messages with
            | stack traces will be shown on every error that occurs within your
            | application. If disabled, a simple generic error page is shown.
            |
            */
        
            'debug' => (bool) env('APP_DEBUG', false),
        
            /*
            |--------------------------------------------------------------------------
            | Application URL
            |--------------------------------------------------------------------------
            |
            | This URL is used by the console to properly generate URLs when using
            | the Artisan command line tool. You should set this to the root of
            | your application so that it is used when running Artisan tasks.
            |
            */
        
            'url' => env('APP_URL', 'http://localhost'),
        
            'asset_url' => env('ASSET_URL', null),
        
            /*
            |--------------------------------------------------------------------------
            | Application Timezone
            |--------------------------------------------------------------------------
            |
            | Here you may specify the default timezone for your application, which
            | will be used by the PHP date and date-time functions. We have gone
            | ahead and set this to a sensible default for you out of the box.
            |
            */
        
            // 下記を修正する
        //    'timezone' => 'UTC',
            'timezone' => 'Asia/Tokyo',
        
            /*
            |--------------------------------------------------------------------------
            | Application Locale Configuration
            |--------------------------------------------------------------------------
            |
            | The application locale determines the default locale that will be used
            | by the translation service provider. You are free to set this value
            | to any of the locales which will be supported by the application.
            |
            */
        
            // 下記を修正する
        //    'locale' => 'en',
            'locale' => 'ja',
        
            /*
            |--------------------------------------------------------------------------
            | Application Fallback Locale
            |--------------------------------------------------------------------------
            |
            | The fallback locale determines the locale to use when the current one
            | is not available. You may change the value to correspond to any of
            | the language folders that are provided through your application.
            |
            */
        
            'fallback_locale' => 'en',
        
            /*
            |--------------------------------------------------------------------------
            | Faker Locale
            |--------------------------------------------------------------------------
            |
            | This locale will be used by the Faker PHP library when generating fake
            | data for your database seeds. For example, this will be used to get
            | localized telephone numbers, street address information and more.
            |
            */
        
            // 下記を修正する
        //    'faker_locale' => 'en_US',
            'faker_locale' => 'ja_JP',
        
            /*
            |--------------------------------------------------------------------------
            | Encryption Key
            |--------------------------------------------------------------------------
            |
            | This key is used by the Illuminate encrypter service and should be set
            | to a random, 32 character string, otherwise these encrypted strings
            | will not be safe. Please do this before deploying an application!
            |
            */
        
            'key' => env('APP_KEY'),
        
            'cipher' => 'AES-256-CBC',
        
            /*
            |--------------------------------------------------------------------------
            | Autoloaded Service Providers
            |--------------------------------------------------------------------------
            |
            | The service providers listed here will be automatically loaded on the
            | request to your application. Feel free to add your own services to
            | this array to grant expanded functionality to your applications.
            |
            */
        
            'providers' => [
        
                /*
                 * Laravel Framework Service Providers...
                 */
                Illuminate\Auth\AuthServiceProvider::class,
                Illuminate\Broadcasting\BroadcastServiceProvider::class,
                Illuminate\Bus\BusServiceProvider::class,
                Illuminate\Cache\CacheServiceProvider::class,
                Illuminate\Foundation\Providers\ConsoleSupportServiceProvider::class,
                Illuminate\Cookie\CookieServiceProvider::class,
                Illuminate\Database\DatabaseServiceProvider::class,
                Illuminate\Encryption\EncryptionServiceProvider::class,
                Illuminate\Filesystem\FilesystemServiceProvider::class,
                Illuminate\Foundation\Providers\FoundationServiceProvider::class,
                Illuminate\Hashing\HashServiceProvider::class,
                Illuminate\Mail\MailServiceProvider::class,
                Illuminate\Notifications\NotificationServiceProvider::class,
                Illuminate\Pagination\PaginationServiceProvider::class,
                Illuminate\Pipeline\PipelineServiceProvider::class,
                Illuminate\Queue\QueueServiceProvider::class,
                Illuminate\Redis\RedisServiceProvider::class,
                Illuminate\Auth\Passwords\PasswordResetServiceProvider::class,
                Illuminate\Session\SessionServiceProvider::class,
                Illuminate\Translation\TranslationServiceProvider::class,
                Illuminate\Validation\ValidationServiceProvider::class,
                Illuminate\View\ViewServiceProvider::class,
        
                /*
                 * Package Service Providers...
                 */
        
                /*
                 * Application Service Providers...
                 */
                App\Providers\AppServiceProvider::class,
                App\Providers\AuthServiceProvider::class,
                // App\Providers\BroadcastServiceProvider::class,
                App\Providers\EventServiceProvider::class,
                App\Providers\RouteServiceProvider::class,
        
            ],
        
            /*
            |--------------------------------------------------------------------------
            | Class Aliases
            |--------------------------------------------------------------------------
            |
            | This array of class aliases will be registered when this application
            | is started. However, feel free to register as many as you wish as
            | the aliases are "lazy" loaded so they don't hinder performance.
            |
            */
        
            'aliases' => [
        
                'App' => Illuminate\Support\Facades\App::class,
                'Arr' => Illuminate\Support\Arr::class,
                'Artisan' => Illuminate\Support\Facades\Artisan::class,
                'Auth' => Illuminate\Support\Facades\Auth::class,
                'Blade' => Illuminate\Support\Facades\Blade::class,
                'Broadcast' => Illuminate\Support\Facades\Broadcast::class,
                'Bus' => Illuminate\Support\Facades\Bus::class,
                'Cache' => Illuminate\Support\Facades\Cache::class,
                'Config' => Illuminate\Support\Facades\Config::class,
                'Cookie' => Illuminate\Support\Facades\Cookie::class,
                'Crypt' => Illuminate\Support\Facades\Crypt::class,
                'DB' => Illuminate\Support\Facades\DB::class,
                'Eloquent' => Illuminate\Database\Eloquent\Model::class,
                'Event' => Illuminate\Support\Facades\Event::class,
                'File' => Illuminate\Support\Facades\File::class,
                'Gate' => Illuminate\Support\Facades\Gate::class,
                'Hash' => Illuminate\Support\Facades\Hash::class,
                'Http' => Illuminate\Support\Facades\Http::class,
                'Lang' => Illuminate\Support\Facades\Lang::class,
                'Log' => Illuminate\Support\Facades\Log::class,
                'Mail' => Illuminate\Support\Facades\Mail::class,
                'Notification' => Illuminate\Support\Facades\Notification::class,
                'Password' => Illuminate\Support\Facades\Password::class,
                'Queue' => Illuminate\Support\Facades\Queue::class,
                'Redirect' => Illuminate\Support\Facades\Redirect::class,
                'Redis' => Illuminate\Support\Facades\Redis::class,
                'Request' => Illuminate\Support\Facades\Request::class,
                'Response' => Illuminate\Support\Facades\Response::class,
                'Route' => Illuminate\Support\Facades\Route::class,
                'Schema' => Illuminate\Support\Facades\Schema::class,
                'Session' => Illuminate\Support\Facades\Session::class,
                'Storage' => Illuminate\Support\Facades\Storage::class,
                'Str' => Illuminate\Support\Str::class,
                'URL' => Illuminate\Support\Facades\URL::class,
                'Validator' => Illuminate\Support\Facades\Validator::class,
                'View' => Illuminate\Support\Facades\View::class,
        
            ],
        
        ];
        
        ```
1. 言語設定ファイルの作成
    1. laravel_crudディレクトリで下記コマンドを実行して日本語かの設定を行うファイルを作成し開く。
    
        ```terminal
        $ vi resources/lang/ja.json
        ```
    1. 開いたファイルに下記の内容を追記する。
    
        ```resources/lang/ja.json
        {
            "Login": "ログイン",
            "Register": "新規登録",
            "Forgot Your Password?": "パスワードを忘れてしまいましたか？",
            "Reset Password": "パスワード再設定",
            "Send Password Reset Link":  "パスワード再設定URLを送信",
          
            "Name": "お名前",
            "E-Mail Address": "メールアドレス",
            "Password": "パスワード",
            "Confirm Password": "パスワード(確認用)",
            "Remember Me": "ログイン状態を保存",
          
            "Hello!": "ご利用ありがとうございます。",
            "Reset Password Notification":  "パスワード再設定のお知らせ",
            "You are receiving this email because we received a password reset request for your account.": "あなたのアカウントでパスワード再発行のリクエストがありました。",
            "This password reset link will expire in :count minutes.": "再設定URLの有効期限は :count 分です。",
            "If you did not request a password reset, no further action is required.": "もしパスワード再発行をリクエストしていない場合、操作は不要です。",
            "If you’re having trouble clicking the \":actionText\" button, copy and paste the URL below\ninto your web browser: [:actionURL](:actionURL)": "\":actionText\"ボタンを押しても何も起きない場合、以下URLをコピーしてWebブラウザに貼り付けてください。\n[:actionURL](:actionURL)",
            "Regards": "よろしくお願いいたします",
          
            "Home": "ホーム",
            "Logout": "ログアウト",
            "Dashboard": "お知らせ",
            "You are logged in!":"ログインしました！"
        }
        ```
1. 確認
    1. laravel_crudディレクトリで下記コマンドを実行してローカルサーバを起動する。

        ```terminal
        $ php artisan serve
        ```
    1. 下記にアクセスする。
        - [http://127.0.0.1:8000/login](http://127.0.0.1:8000/login)
    1. Authの認証ページが日本語化されていることを確認する。