Added automatic translation about the project.

app/application/lang/en/validation.php

@@ -310,6 +310,7 @@ return [
         'content_images'           => 'content images',
         'source_language_id'       => 'source language identifier',
         'translate_from_language'  => 'translate from language',
+        'translate-automatically'   => 'translate automatically',
         'translate-automatically.*' => 'translate automatically',
     ],
 ];