Version 5.0.6

applications/core/modules/admin/languages/languages.php

@@ -762,7 +762,6 @@ class languages extends Controller
 
 		$form = new Form( 'form', 'langauge_export_button' );
 		// This appears inside a dialog. The following instructs the dialog to handle the download via JS rather than using a native form download. This allows the dialog to close when done.
-		$filename = $lang->title . " {$lang->version}.xml";
 		$form->attributes['data-form-is-download'] = '';
 
 		$form->add( new Text( 'language_export_author_name', $lang->author_name, false ) );
@@ -885,6 +884,7 @@ class languages extends Controller
 
 			/* Finish */
 			$xml->endDocument();
+			$filename = $lang->title . " {$lang->version}.xml";
 			Output::i()->sendOutput(
 				$xml->outputMemory(),
 				200,