From [forum](http://forum.piwik.org/index.php?showtopic=238), if the lang directory contains a _vti directory, an error occurs.

This can also happen if you test Piwik from your svn working directory, and your editor leaves behind files, such as “lang/en.php~”.

```
Index: plugins/LanguagesManager/API.php
===============
- plugins/LanguagesManager/API.php (revision 906)
+ plugins/LanguagesManager/API.php (working copy)
@ -30,7 +30,7 @
return self::$languageNames;
}
$path = PIWIK_INCLUDE_PATH . “/lang/”;
- $languages = glob($path . “*”);
+ $languages = glob($path . “*.php”);
$pathLength = strlen($path);
$languageNames = array();
foreach($languages as $language)
```