not working

The plugin isn’t responsible for displaying translations on your website.
If the plugin is generating MO files successfully then it has done it’s job.

However, you may want to check they are saved in the place you are expecting.
Some guides that may help you find your problem:
https://localise.biz/help/wordpress/theme-localization
https://localise.biz/help/wordpress/loading-translations

Thanks Tim.
I have already located all filles and they are correct.
I think I have a mistake by adding the string on wp-config.php

I am trying this:
define( ‘WPLANG’, ‘es_ES’ );

Do I have to add something else?
The directory is where the file is located is:
public_html/wp-content/themes/PersesMag/languages

Many Thanks!!

Jose

Have you resolved this?

I discovered since this thread that WordPress 4 has deprecated the WPLANG constant:
https://timwhitlock.info/blog/2014/10/wordpress-4-deprecates-the-wplang-constant/