[Résolu] 500 error on using Different languages ​​in directories url format

Hi,

Thank you for contacting WPML Support. Based on the details you provided, it appears that the issue may be related to specific plugins or themes on your site. To address this, could you please follow the below steps and see if this resolves your issue:

1. Please take a backup of your site first for safety reasons.

2. The current WP Memory Limit on your site is 40MB. The WP memory limit needs to be increased, it's different from PHP memory. PHP memory is fine but WordPress uses 40MB as default in your site. The minimum requirements for WPML are 128MB: https://wpml.org/home/minimum-requirements/

Please add this to the top of wp-config.php to increase WP memory:

/* WP Memory Limit */
define('WP_MEMORY_LIMIT', '256M');

3. We have recently released WPML 4.6.10, could you please update it to the latest version.

You can update it from Plugins >> Add New plugin page, click the Commercial tab, and then click the “Check for updates” button. Here is the screenshot for more details:
https://wpml.org/wp-content/uploads/2020/04/wpml-force-plugin-update-1.png

4. Please add the below code in the functions.php file of your theme:

add_filter('mod_rewrite_rules', 'fix_rewritebase');
function fix_rewritebase($rules){
    $home_root = parse_url(home_url());
    if ( isset( $home_root['path'] ) ) {
        $home_root = trailingslashit($home_root['path']);
    } else {
        $home_root = '/';
    }
  
    $wpml_root = parse_url(get_option('home'));
    if ( isset( $wpml_root['path'] ) ) {
        $wpml_root = trailingslashit($wpml_root['path']);
    } else {
        $wpml_root = '/';
    }
  
    $rules = str_replace("RewriteBase $home_root", "RewriteBase $wpml_root", $rules);
    $rules = str_replace("RewriteRule . $home_root", "RewriteRule . $wpml_root", $rules);
  
    return $rules;
}

5. Please re-save the permalinks from the Settings >> Permalinks page by pressing the Save Changes button and see if this resolves your issue.

6. Please delete all sorts of caches on your site/server cache if any / plugin cache / CDN cache, clear the browser cache, and then see if it resolves the issue afterward.

Here is a doc for more details:
https://wpml.org/faq/why-is-htaccess-getting-overwritten-with-the-language-folder-on-my-wpml-website/

Please let me know the results,

Thank you