Changed the language for DataTables to make use of the i18n plug-in json file and added the Dutch translation file

wp-jquery-datatable.php

@@ -282,8 +282,8 @@ function wp_jdt_shortcode($atts)
                     'order': [<?php echo $table_order_row_number; ?>, '<?php echo esc_js($table_order_sort); ?>'],
                     'searching': <?php echo $table_searching; ?>,
                     'language': {
-                        'search': '<?php echo esc_js(esc_html__('Searching', 'wp-jquery-datatable')); ?>:'
-                    }
+                        'url': '<?php echo esc_url(get_jdt_locale_json_file()); ?>',
+                    },
                 });
             });
         </script>
@@ -313,3 +313,35 @@ function wp_jdt_uninstall()
         delete_option($setting);
     }
 }
+
+/**
+ * Get the path of the locale JSON file if it exists.
+ *
+ * @return string|null File path if valid, or null if skipped/missing.
+ */
+function get_jdt_locale_json_file()
+{
+    // 1. Get the current locale (e.g., 'nl_NL', 'en_US', 'en_GB')
+    $locale = get_user_locale();
+
+    // 2. Exclude en_US specifically as that's the default dataTables language
+    // (en_GB and other English regional locales remain valid)
+    if ($locale === 'en_US') {
+        return null;
+    }
+
+    // 3. Format the filename ('nl_NL' -> 'nl-NL.json')
+    $formatted_locale = str_replace('_', '-', $locale);
+    $filename         = "{$formatted_locale}.json";
+
+    // 4. Set relative path inside your plugin directory
+    $relative_path    = "plug-ins/i18n/{$filename}";
+
+    // 5. Verify file existence on disk
+    if (!file_exists(plugin_dir_path(__FILE__) . $relative_path)) {
+        return null;
+    }
+
+    // 6. Return either the direct URL or the absolute file path
+    return plugin_dir_url(__FILE__) . $relative_path;
+}