Hard-coded custom traductions in WP (for when WPML isn't enough)

functions.php

<?php
// Custom translations
add_action('wp_enqueue_scripts', function(){
    wp_enqueue_script('translations-js', get_stylesheet_directory_uri() . '/assets/js/translations.js');
});
?>

translations.js

var project = project || {};

project.translations = function ($) {

    "use strict";

    let initialize = function () {
        // Call functions here
        translateOneItemInCart($('.woocommerce-cart-form h2'));
    };

    // Put custom translation functions here. 
    // - Example:
    let translateOneItemInCart = function (selector) {
        if (!selector.length) return;
        if ('You Have 1 Item In Your Cart' !== selector.html()) return;
        selector.each(function () {
            translate($(this), 'You Have 1 Item In Your Cart', 'Vous avez 1 article dans votre panier');
        });
    };

    // The actual translation process
    let translate = function (selector, oldText, newText) {
        let content = selector.html();
        let newContent = content.replace(oldText, newText);
        selector.html(newContent);
    };

    return {
        init: function () {
            initialize();
        }
    };

}(jQuery);

jQuery(document).ready(function () {
    project.translations.init();
});