Ritual Credits can not be transferred from one currency to another, and can only be redeemed at Restaurants offering the matching local currency. To confirm your current Ritual Credits you can head in-app to the “More” tab and select “Credits”.
If it appears that your credits are not in your local currency, please attach a screenshot of your “Credits” tab and let us know where you are currently using the app so that we can best help you out with this!