HOW do you know???
Construct, you are doing a LOT of guessing.
I'll ask again. Do you know what type of wiring they use in Europe/Asia???
If not then DON'T guess.
Who's guessing, I took the info given, the wire running on the surface of a wall that looks like some sort of bell wire or zip cord and a plastic switch with no box visible, looks to me to be unsafe in any country or world. Caution dictates to have a local QUALIFIED person look at the situation.
No I am NOT qualified to wire a house, switch, or dog house in lebanon, the country, but I know from a picture when something looks not so good.
Speedy Petey, do you know how many fires are caused by unqualified people running extension cords and other type wire on the surface? Me either, but I know most codes say it is a bad idea.
The ICC has a book called "The INTERNATIONAL Residential Building Code" I guess one could take from that, that electricity acts the same and follows the same natural laws no matter what part of the world you live in.
In a case like this I wish the original poster would get back and tell us more about it.
SP are you saying where you live it is OK to run unprotected wire on the surface and install a switch without a box, in a bedroom?
If you want to do that, they make pre wired lamps with switches on the cord you can plug in, even with wireless remotes.