IPN/webhook URLs should not be localized
On a site with polylang enabled Stripe displays an error that the webhook path is not setup correctly because it returns the first, default locale URL.
But the non-localized https://sitename.org/civicrm/payment/ipn/1/ also works as well as other locales.
CRM_Utils_System::url() generate a localized URL and there doesn't seem to be a way to ask for a specific locale (or default) - see https://lab.civicrm.org/extensions/mjwshared/-/blob/master/CRM/Mjwshared/WebhookTrait.php#L27
Not sure what the solution is here - @haystack @kcristiano - it causes Stripe to display errors about webhook configuration when it doesn't need to. Updating the webhook works too but is not actually necessary.