Nginx Reverse Proxy Loop Redirect

Question

I have a Nginx fully working (without proxy mode) with this directive configured.

Domain: www.example.com

index index.php;
# [REQUIRED EDIT] if you are using multiple languages
rewrite ^/es$ /es/ redirect;
rewrite ^/es/(.*) /$1;
rewrite ^/gb$ /gb/ redirect;
rewrite ^/gb/(.*) /$1;

    # Images
    rewrite ^/([0-9])(-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+.jpg$ /img/p/$1/$1$2$3.jpg last;
    rewrite ^/([0-9])([0-9])(-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+.jpg$ /img/p/$1/$2/$1$2$3$4.jpg last;
    rewrite ^/([0-9])([0-9])([0-9])(-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+.jpg$ /img/p/$1/$2/$3/$1$2$3$4$5.jpg last;
    rewrite ^/([0-9])([0-9])([0-9])([0-9])(-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+.jpg$ /img/p/$1/$2/$3/$4/$1$2$3$4$5$6.jpg last;
    rewrite ^/([0-9])([0-9])([0-9])([0-9])([0-9])(-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+.jpg$ /img/p/$1/$2/$3/$4/$5/$1$2$3$4$5$6$7.jpg last;
    rewrite ^/([0-9])([0-9])([0-9])([0-9])([0-9])([0-9])(-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+.jpg$ /img/p/$1/$2/$3/$4/$5/$6/$1$2$3$4$5$6$7$8.jpg last;
    rewrite ^/([0-9])([0-9])([0-9])([0-9])([0-9])([0-9])([0-9])(-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+.jpg$ /img/p/$1/$2/$3/$4/$5/$6/$7/$1$2$3$4$5$6$7$8$9.jpg last;
    rewrite ^/([0-9])([0-9])([0-9])([0-9])([0-9])([0-9])([0-9])([0-9])(-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+.jpg$ /img/p/$1/$2/$3/$4/$5/$6/$7/$8/$1$2$3$4$5$6$7$8$9$10.jpg last;
    rewrite ^/c/([0-9]+)(-[.*_a-zA-Z0-9-]*)(-[0-9]+)?/.+.jpg$ /img/c/$1$2$3.jpg last;
    rewrite ^/c/([a-zA-Z_-]+)(-[0-9]+)?/.+.jpg$ /img/c/$1$2.jpg last;

    # AlphaImageLoader for IE and fancybox
    rewrite ^images_ie/?([^/]+)\.(jpe?g|png|gif)$ js/jquery/plugins/fancybox/images/$1.$2 last;


    # without this line nginx seo url not working.
    try_files $uri $uri/ /index.php?$args;


    # PHP FPM part
    location ~ \.php$ {
        # Verify that the file exists, redirect to index if not
        try_files $fastcgi_script_name /index.php$uri&$args =404;

        fastcgi_index  index.php;

        # Environment variables for PHP
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
    }

If i configure nginx in proxy mode (for better performance), without edit any configuration, the site start in a infinite loop. The site is a Prestashop multilanguage with 2 languages: https://www.example.com/es/ https://www.example.com/gb/

By default load /es/ site, and the infinite loop is over the same url https://www.example.com/es/

I review .htaccess but i cannot see any error:

# ~~start~~ Do not remove this comment, Prestashop will keep automatically the code outside this comment when .htaccess will be generated again
# .htaccess automaticaly generated by PrestaShop e-commerce open-source solution
# https://www.prestashop.com - https://www.prestashop.com/forums

<IfModule mod_rewrite.c>
<IfModule mod_env.c>
SetEnv HTTP_MOD_REWRITE On
</IfModule>

RewriteEngine on
RewriteCond %{HTTP:Authorization} ^(.*)
RewriteRule . - [E=HTTP_AUTHORIZATION:%1]


#Domain: www.example.com
RewriteRule . - [E=REWRITEBASE:/]
RewriteRule ^api(?:/(.*))?$ %{ENV:REWRITEBASE}webservice/dispatcher.php?url=$1 [QSA,L]

# Images
RewriteCond %{HTTP_HOST} ^www.example.com$
RewriteRule ^([0-9])(\-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+\.jpg$ %{ENV:REWRITEBASE}img/p/$1/$1$2$3.jpg [L]
RewriteCond %{HTTP_HOST} ^www.example.com$
RewriteRule ^([0-9])([0-9])(\-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+\.jpg$ %{ENV:REWRITEBASE}img/p/$1/$2/$1$2$3$4.jpg [L]
RewriteCond %{HTTP_HOST} ^www.example.com$
RewriteRule ^([0-9])([0-9])([0-9])(\-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+\.jpg$ %{ENV:REWRITEBASE}img/p/$1/$2/$3/$1$2$3$4$5.jpg [L]
RewriteCond %{HTTP_HOST} ^www.example.com$
RewriteRule ^([0-9])([0-9])([0-9])([0-9])(\-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+\.jpg$ %{ENV:REWRITEBASE}img/p/$1/$2/$3/$4/$1$2$3$4$5$6.jpg [L]
RewriteCond %{HTTP_HOST} ^www.example.com$
RewriteRule ^([0-9])([0-9])([0-9])([0-9])([0-9])(\-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+\.jpg$ %{ENV:REWRITEBASE}img/p/$1/$2/$3/$4/$5/$1$2$3$4$5$6$7.jpg [L]
RewriteCond %{HTTP_HOST} ^www.example.com$
RewriteRule ^([0-9])([0-9])([0-9])([0-9])([0-9])([0-9])(\-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+\.jpg$ %{ENV:REWRITEBASE}img/p/$1/$2/$3/$4/$5/$6/$1$2$3$4$5$6$7$8.jpg [L]
RewriteCond %{HTTP_HOST} ^www.example.com$
RewriteRule ^([0-9])([0-9])([0-9])([0-9])([0-9])([0-9])([0-9])(\-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+\.jpg$ %{ENV:REWRITEBASE}img/p/$1/$2/$3/$4/$5/$6/$7/$1$2$3$4$5$6$7$8$9.jpg [L]
RewriteCond %{HTTP_HOST} ^www.example.com$
RewriteRule ^c/([0-9]+)(\-[\.*_a-zA-Z0-9-]*)(-[0-9]+)?/.+\.jpg$ %{ENV:REWRITEBASE}img/c/$1$2$3.jpg [L]
RewriteCond %{HTTP_HOST} ^www.example.com$
RewriteRule ^c/([a-zA-Z_-]+)(-[0-9]+)?/.+\.jpg$ %{ENV:REWRITEBASE}img/c/$1$2.jpg [L]
# AlphaImageLoader for IE and fancybox
RewriteRule ^images_ie/?([^/]+)\.(jpe?g|png|gif)$ js/jquery/plugins/fancybox/images/$1.$2 [L]

# Dispatcher
RewriteCond %{REQUEST_FILENAME} -s [OR]
RewriteCond %{REQUEST_FILENAME} -l [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^.*$ - [NC,L]
RewriteRule ^.*$ %{ENV:REWRITEBASE}index.php [NC,L]
</IfModule>

<Files composer.lock>
    # Apache 2.2
    <IfModule !mod_authz_core.c>
        Order deny,allow
        Deny from all
    </IfModule>

    # Apache 2.4
    <IfModule mod_authz_core.c>
        Require all denied
    </IfModule>
</Files>
#If rewrite mod isn't enabled
ErrorDocument 404 /index.php?controller=404

# ~~end~~ Do not remove this comment, Prestashop will keep automatically the code outside this comment when .htaccess will be generated again

If i remove/comment this lines in nginx directives, the site run, but i get some 404 because the rewrite doesn't works correctly.

# [REQUIRED EDIT] if you are using multiple languages
rewrite ^/es$ /es/ redirect;
rewrite ^/es/(.*) /$1;
rewrite ^/gb$ /gb/ redirect;
rewrite ^/gb/(.*) /$1;

What's happening? Is nginx's redirect directive conflicting with Apache's .htaccess?

The solution is:

Replace this lines in nginx conf:

rewrite ^/es/(.*) /$1;
rewrite ^/gb/(.*) /$1;

by

if (!-e $request_filename){
    rewrite ^/(es|gb)/(.*)$ /index.php last;
}

Now, all works perfectly.

Thanks u