Wether Liverpool extends Salah 's contract or not, I don't think the player has anything to lose because he has won it all at Liverpool, he might as well just decide to move to the middle east, maybe Saudi or Qatar, I think a lot of clubs would be dying to have him wear their shirt, so it's left for Liverpool to decide if they would love to retain him or not because their silence is creating so much suspicion about the Salah 's future.
On the side of Mohammed Salah he still have his heart for the club. We all know that he is still in a good shape and has been very proactive for the club too, and this should make the coach persuade the club to extend his contract to one or two years, except the coach thinks otherwise.
Culturally, that wouldn't be a problem for him at all, he is an Islamic and those are Islamic nations, so it should be easier transition for him than most European players. I say this, because Europeans have different culture, it's not just about being able to eat bacon and drink beer, contrary to popular belief, you can find those in Saudi Arabia too, obviously won't be common drinking at some park lol, but there are bars and clubs just like west where you can have fun, or can just purchase it for your home for later, western nations think it's dictatorship there, but it's allowed and not banned as you might think.
I am saying Salah would have easier time because he wouldn't look like the outlier, instead, he would fit right in there and be just like everyone else, may feel more welcomed, may feel more at home.