Welcome to the Q&A Forum

Good morning Just a quick question.  Why does AirBNB not get penalised for duplicate content on its sites. For example, the following two urls (and probably more for other countries), both rank appropriately in the google (UK and COM), https://www.airbnb.co.uk/help/getting-started/how-to-travel
https://www.airbnb.com/help/getting-started/how-to-travel Their are no canonical tags, no Alternative etc If I look at the following https://www.airbnb.co.uk/s/London--United-Kingdom
https://www.airbnb.com/s/London--United-Kingdom They both have alternative to point to the other language versions which I would expect. However they also both point to them selves as canonical.  Would this not be duplicate content ? Thanks for your insights Shane