Theme translation is not working

Hey there.

I added some translations in:

https://premium.wpmudev.org/translate/projects/upfront/es-mx/default

Then downloaded both, the .po and the .mo and placed them in the global folder ( /wp-content/languages/themes/ ). But I still don't see the changes.

I am only interested in the contact form fields for the moment, so I was expecting to see the changes in the landing page where the module is placed.

To verify that I was placing them as supposed, I also used the admin dashboard .mo file, and it worked perfectly and right away.

Regards.