Honestly guys, I sometimes roll my eyes
when you post that we pax do not understand your operations and then you give a lecture that fails to take into account anything outside your narrow frame of reference.
I'll give you a clue, why would an airline open the door to accept a passenger?
You are great F3G!
I fly roughly the same number of sectors per years as you do but I have a less variety of airlines, so safety briefing is pretty much the same.
Just last Tuesday I took a Golden Air Saab 340 from Bromma to Trollhätan (and return) and the whole safety briefing was in Swedish.
On the outbound leg the Flight Attendant come and briefed me in English (I was sitting on the emergency exit).
On the return flight I did not get any English briefing.
I then took the last Malmö Aviation flight of the day to Malmö and the briefing was in Swedish too (again no English briefing).
However before landing the Captain alerted the crew with a perfect:"Cabin Crew prepare for landing"
Ciao
Ulxima