We had avoided most of the multis in Lisbon since we've been here as we were concerned about collecting waypoint info in a foreign language. Upon reading the cache description here, we realised that wouldn't be a problem with this one.
We collected the required answer, that gave us the final location, and made our way there.
GZ sure was busy! It took a while before we were able to properly check the correct spot. Sadly, after checking with the spoiler photo we can confirm this cache is not here.