我不太熟悉nginx和重定向。这可能是一个愚蠢的问题，但我希望有人能帮助我一点。

问题：

系统有一个全局默认的区域设置“de”为domain.com/...但对于一个域，我需要它作为默认语言。可悲的是，它是不可能改变默认语言，在该CMS为特定的域/网站。
"我现在要做的是“
如果在url（domain.com/...）中没有给出区域设置，那么nginx应该重定向到domain/it/...
其他区域设置是/de和/en und，不应更改。
“最后我想做的是”
domain.com/... -> domain.com/it/...
domain.com/de/... -> no redirect
domain.com/en/... -> no redirect
domain.com/en/... -> no redirect
nginx配置中的实际位置是：

location ~ /\. {
    access_log off;
    log_not_found off;
    deny all;
}

location = /favicon.ico {
    log_not_found off;
    access_log off;
}

location = /robots.txt {
    allow all;
    log_not_found off;
    access_log off;
}

location ~ /_Resources/ {
    access_log off;
    log_not_found off;
    expires max;

    if (!-f $request_filename) {
        rewrite "/_Resources/Persistent/([a-z0-9]{40})/.+\.(.+)" /_Resources/Persistent/$1.$2 break;
        rewrite "/_Resources/Persistent(?>/[a-z0-9]{5}){8}/([a-f0-9]{40})/.+\.(.+)" /_Resources/Persistent/$1.$2 break;
    }
}

location / {
    try_files $uri $uri/ /index.php?$args;
}

location ~ \.php$ {
    include /usr/local/etc/nginx/fastcgi_params;
    try_files $uri =404;
    fastcgi_pass unix:/var/run/php-fpm/php-fpm.socket;
    fastcgi_index index.php;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    fastcgi_param PATH_INFO $fastcgi_path_info;
    fastcgi_param FLOW_REWRITEURLS 1;
    fastcgi_param FLOW_CONTEXT Production;
    fastcgi_param FLOW_ROOTPATH /var/www/public_html/current/;
    fastcgi_param X-Forwarded-For $proxy_add_x_forwarded_for;
    fastcgi_param X-Forwarded-Port $proxy_port;
    fastcgi_param SERVER_NAME $http_host;
    fastcgi_param SERVER_PORT 443;
    fastcgi_split_path_info ^(.+\.php)(.*)$;
    fastcgi_read_timeout 300;
    fastcgi_buffer_size 128k;
    fastcgi_buffers 256 16k;
    fastcgi_busy_buffers_size 256k;
    fastcgi_temp_file_write_size 256k;
}

我希望这是可以理解的