CURCY and currency parameter issues

Hello,

I am encountering an issue with the following setup:

– Fixed converted prices are necessary for Google Shopping ads.
– Geolocated currency display is required for regional users.
– URL parameter-based currency override is essential to ensure the correct currency is applied when a link contains a specific currency parameter (e.g., ?wmc-currency=MXN).

The third point is critical for running Google Shopping ads. Google’s systems require the wmc-currency parameter appended to product links so that the currency in the link matches the feed for the destination country.

Example Scenario:

Base currency: EUR (selling to Spain).
Secondary currency: MXN (selling to Mexico).
Default currency: EUR.
When Google checks Mexican product links like domain.com/products/?wmc-currency=MXN from their US servers, the currency defaults to EUR instead of being forced to MXN. A manual page refresh then switches the currency to MXN, but this doesn’t meet the requirements for Google’s validation process.

How can we ensure that the wmc-currency parameter takes precedence and forces the correct currency on the first load?

Thank you for your assistance.