Date Wordpress Translate
/**
* WordPress Localized Language, defaults to English.
*
* Change this to localize WordPress. A corresponding MO file for the chosen
* language must be installed to wp-content/languages. For example, install
* de_DE.mo to wp-content/languages and set WPLANG to 'de_DE' to enable German
* language support.
*/
define('WPLANG', 'ES_es');
Create the folder languages in wp-content and put the file es_ES.mo y es_ES.po
<?php echo date_i18n('F'); ?>