Reported for: WooCommerce Multilingual 3.8
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.
Replace your file located at:
with the contents of this file:
or use the patch at this link