Duplicate room pages compete with each other
Search engines may split attention between duplicate pages, so neither performs as well as a single strong page would.
Evidence
Two URL patterns serve identical room content, and each page declares itself canonical.
- www.hotel-mar-serena.example/rooms/deluxe-sea-view
- www.hotel-mar-serena.example/en/rooms/deluxe-sea-view/
Recommended action
Choose one URL pattern, 301-redirect the other, and set canonical tags to the preferred version.