wordpress-plugin-boilerplate/includes/class-i18n.php

<?php

/**
 *  Define the internationalization functionality.
 *
 *  Loads and defines the internationalization files for this plugin
 *  so that it is ready for translation.
 *
 *  @since      1.0.0
 *  @package    Test
 *  @subpackage Test/includes
 *  @author     test <test>
 */

if (!defined('ABSPATH')) {
    exit; // Exit if accessed directly
}

class Test_i18n
{
	/**
	 *  Load the plugin text domain for translation.
	 *
	 *  @since    1.0.0
	 */
	public function load_plugin_textdomain()
    {
		load_plugin_textdomain(
			'test',
			false,
			dirname(dirname(plugin_basename(__FILE__))).'/languages/'
		);
	}
}