- Status
- Resolved
- Reported for
- WPML Multilingual & Multicurrency for WooCommerce 3.8.2
- Resolved in
- WooCommerce Multilingual 3.8.3
Overview of the issue
On the front-end, all global Add-on labels display the first option label. They should display the correct option labels.
You can see an example of the issue in the following screenshot. 
Workaround
In the ../woocommerce-multilingual/compatibility/class-wcml-product-addons.php file, change this line
$addons[ $key ][ 'options' ][ $opt_key ][ 'label' ] = apply_filters( 'wpml_translate_single_string', $option['label'], 'wc_product_addons_strings', $object_id . '_addon_' . $addon['type'] . '_' . $addon['position'] . '_option_label_' . $key );
to:
$addons[ $key ][ 'options' ][ $opt_key ][ 'label' ] = apply_filters( 'wpml_translate_single_string', $option['label'], 'wc_product_addons_strings', $object_id . '_addon_' . $addon['type'] . '_' . $addon['position'] . '_option_label_' . $opt_key );
This workaround will be applied in the next, 3.8.3 release of WooCommerce Multilingual.