function custom_woocommerce_text($translated_text, $text, $domain) {
    switch ($translated_text) {
        case 'Product':
            $translated_text = 'File';
            break;
        // Add more cases for other phrases you want to customize

        // Example for changing "Add to Cart" button text:
        // case 'Add to cart':
        //     $translated_text = 'Custom Button Text';
        //     break;
    }
    return $translated_text;
}
add_filter('gettext', 'custom_woocommerce_text', 20, 3);