Yes. the line I added the comment to:
```php
if ($filename=='application_lang.php' || in_array($filename, $arFiles)) {
```

I'm OK with the idea that we should make sure at least that file is available, I'm just not sure it should be necessary, as the absence of this file from this location may lead to other issues, as well. After all, if the other files are not in the folder and this function is called on one of them, the function will fail.