Problem: The client is trying to configure the Swish payment gateway to only be shown for Swedish language users on their site and to allow payments in SEK while ordering in Euro. However, they encountered an issue where Swish is not supported for different currencies at checkout, and they received an error message 'AM03 - Invalid or missing currency' when attempting to pay with Swish on the English version of the site. Solution: We recommend setting SEK as a second currency in WooCommerce > WooCommerce Multilingual & Multi-Currency and making it the default currency for the Swedish site language. Additionally, you should exclude SEK from being available in other active languages to prevent the error. For more detailed guidance, please read our documentation on WooCommerce Multilingual & Multi-Currency. If you need to exclude the Swish payment gateway for non-Swedish languages, the plugin author would need to participate in our Go Global Program.
Please note that this solution might be irrelevant if it's outdated or not applicable to your case. We highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If the issue persists, please open a new support ticket.
