Added Language::getPageExtensions() to get full list of supported page language extensions

CHANGELOG.md

@@ -7,6 +7,7 @@
     * Added `getFlexFeatures()` method to return all features that `FlexObject` or `FlexCollection` implements
     * Deprecated `FlexDirectory::update()` and `FlexDirectory::remove()`
     * Added `FlexStorage::getMetaData()` to get updated object meta information for listed keys
+    * Added `Language::getPageExtensions()` to get full list of supported page language extensions
 1. [](#improved)
     * Better support for Symfony local server `symfony server:start`
     * Make `Route` objects immutable

system/src/Grav/Common/Language/Language.php

@@ -280,6 +280,16 @@ class Language
         return (bool) $this->lang_in_url;
     }
 
+    public function getPageExtensions($fileExtension = null)
+    {
+        $fileExtension = (string)$fileExtension ?: '.md';
+        $extensions['-'] = $fileExtension;
+        foreach ($this->languages as $code) {
+            $extensions[$code] = '.' . $code . $fileExtension;
+        }
+
+        return $extensions;
+    }
 
     /**
      * Gets an array of valid extensions with active first, then fallback extensions