yueke/application/admin/lang/en/auth/admin.php

<?php

return [
    'Email'                                     => 'Email',
    'Mobile'                                    => 'Mobile',
    'Group'                                     => 'Group',
    'Loginfailure'                              => 'Login failure',
    'Login time'                                => 'Login time',
    'The parent group exceeds permission limit' => 'The parent group exceeds permission limit',
    'Please input correct username'             => 'Please input correct username',
    'Username must be 3 to 30 characters'       => 'Username must be 3 to 30 characters',
    'Please input correct password'             => 'Please input correct password',
    'Password must be 6 to 30 characters'       => 'Password must be 6 to 30 characters',
];