@ShiningInLuz From your post -"The normal language in Luz is English. The Dutch, Germans and English use, and local Portuguese folks use it."
IMO there are many people living in PDL who speak portuguese and don't speak english.
Many of the GNR officers attending did not speak english - this is easy to prove.
And for example when you go in the laundrette I think you will hear the normal language is portuguese.
There isn't a permanent GNR presence in Luz. The nearest GNR station is Lagos.
When I went to gaze at SY investigating the mound, the bored GNR officer who struck up a conversation with me spoke to me only in English.
When I passed the primary school (near the Smithman sighting) a young boy struck up a conversation with me, in good English with a Portuguese accent.
There are typically Portuguese facilities in Luz - Fernando's, the café on Rua Direita, the supermarket on the beach road. Obviously Portuguese people can and do speak Portuguese. However, by far the dominant language spoken in Luz is English, whether in pubs, restaurants, banks, shops etc., to the extent that it is rare to hear Portuguese spoken.
The main exception is August each year, when there is a large influx of tourists from Portugal. Then the dominant language heard when one is out and about is Portuguese.