Overview of the Issue
In WooCommerce Extra Fees Plugin, a fee with no translation does not apply in other languages, also when the fees are set to show the default language when there is no translation. Shoppers in a second language do not pay the fee, so the order total differs.
Workaround
Until Dotstore fixes it, translate every fee:
- Go to WPMLTranslation Management.
- Select the fees and send them to translation into each language of your site.
- Complete the translations. The translated fees and their rules then apply in every language.