Resolve issue 25896: Cannot create folder using only letters

Author: edenduong

app/code/Magento/Cms/Model/Wysiwyg/Images/Storage.php

@@ -416,7 +416,7 @@ public function createDirectory($name, $path)
     {
         if (!preg_match(self::DIRECTORY_NAME_REGEXP, $name)) {
             throw new \Magento\Framework\Exception\LocalizedException(
-                __('Please rename the folder using only letters, numbers, underscores and dashes.')
+                __('Please rename the folder using only Latin letters, numbers, underscores and dashes.')
             );
         }
 

app/code/Magento/Cms/Test/Unit/Model/Wysiwyg/Images/StorageTest.php

@@ -7,6 +7,7 @@
 
 use Magento\Cms\Model\Wysiwyg\Images\Storage\Collection as StorageCollection;
 use Magento\Framework\App\Filesystem\DirectoryList;
+use Magento\Framework\Exception\LocalizedException;
 
 /**
  * @SuppressWarnings(PHPMD.LongVariable)
@@ -539,4 +540,18 @@ public function testUploadFile()
 
         $this->assertEquals($result, $this->imagesStorage->uploadFile($targetPath, $type));
     }
+
+    /**
+     * Test create directory with invalid name
+     */
+    public function testCreateDirectoryWithInvalidName()
+    {
+        $name = 'папка';
+        $path = '/tmp/path';
+        $this->expectException(LocalizedException::class);
+        $this->expectExceptionMessage(
+            (string)__('Please rename the folder using only Latin letters, numbers, underscores and dashes.')
+        );
+        $this->imagesStorage->createDirectory($name, $path);
+    }
 }