If Translatable is active, set the Locale for new records

code/forms/gridfield/GridFieldSiteTreeAddNewButton.php

@@ -120,6 +120,12 @@ public function handleAction(GridField $gridField, $actionName, $arguments, $dat
 				"PageType" => $tmpData['pageType']
 			);
 
+			// If Translatable is active, set the Locale (because it doesn't
+			// do that itself if the SiteTree record is created this way)
+			if(singleton('SiteTree')->hasExtension('Translatable')) {
+				$data['Locale'] = Translatable::get_current_locale();
+			}
+
 			$controller = Injector::inst()->create("CMSPageAddController");
 
 			$form = $controller->AddForm();