Localize own Javascript with WPML current language (icl_vars was removed in 3.8)

localize_js_wpml_language.php

<?php

	add_action('wp_enqueue_scripts', 'my_scripts');
	function my_scripts() {
		// Add your JS file 
		wp_enqueue_script( 'my_script', get_template_directory_uri().'/js/functions.js' );
		// Localize your script with server side data
		global $sitepress;
		wp_localize_script( 'my_script', 'my_var', array(
			'wpml_current_language' => $sitepress->get_current_language(), //On javascript use my_var.wpml_current_language to get this value
			'any_other_var' => 'any_other_value', //On javascript use my_var.any_other_var to get this value
		) );
	}

Now with WordPress Coding Standards 😅

    add_action( 'wp_enqueue_scripts', 'my_scripts' );
    function my_scripts() {

        // Localize your script with server side data.
        global $sitepress;

        // Add your JS file.
        wp_enqueue_script( 'my_script', get_template_directory_uri() . '/js/functions.js' );

        $data = array(
            'any_other_var' => 'any_other_value',
        );

        if ( ! empty( $sitepress->get_current_language() ) ) {
            $data['wpml_current_language'] = $sitepress->get_current_language();
        }

        wp_localize_script( 'my_script', 'my_var', $data );
    }