Can’t translate my site

Hi,

After spending a few days trying to solve this myself, I ask you for help. I can’t translate my site to Spanish, I have uploaded, changed and deleted too many .mo .po files to be true. I’ve created a child theme, a new .css and functions.php… etc, but nothing seems to work, and I need to translate this theme and woocommerce store, I have all the files .mo, .po inside wp-content/languages and the wp-config.php set to WPLANG es_CL.

Please help!

wp-config.php:

/**
 * 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_CL' );

/**

Functions.php:

<?php

// Make the theme translatable

function vantage_child_set_text_domain(){
load_theme_textdomain( 'vantage', get_stylesheet_directory() . '/languages' );
}
add_action('after_setup_theme', 'vantage_child_set_text_domain', 15);

?>

Style.css

/*
 Theme Name:   Vantage Premium
 Author:       SiteOrgin
 Template:     vantage
*/

@import url("../vantage/style.css");