chore: Translate django.po in es_419

63% of minimum 50% translated source file: 'django.po'
on 'es_419'.

Sync of partially translated files: 
untranslated content is included with an empty translation 
or source language content depending on file format

translations/FeedbackXBlock/feedback/conf/locale/es_419/LC_MESSAGES/django.po

@@ -168,7 +168,7 @@ msgstr "Ejemplo: Por favor, proporciónenos comentarios sobre esta sección."
 
 #: templates/html/studio_view.html:52
 msgid "Freeform placeholder"
-msgstr ""
+msgstr "Texto del comentario libre del usuario"
 
 #: templates/html/studio_view.html:55
 msgid "This is shown as grayed out text before the student has answered."