Translated BACS instruction and description strings not being displayed on order complete page

Overview of the issue

Completing an order and visiting the complete order page, you can see your instructions in your default language and not translated to the current language that is being used.

The issue currently is reported for BACS – Bank payments, however, this could happen for any gateway that has strings for description and information.

The strings are registered in the WPML String Translation table, and you can translate them, but they are simply not being used at this time, to properly display translated values.

Workaround

Replace your file located at:

wp-content/plugins/woocommerce-multilingual/inc/wc-strings.class.php

with the contents of this file:

https://github.com/OnTheGoSystems/woocommerce-multilingual/blob/develop/inc/wc-strings.class.php

or use the patch at this link