MO320777:
1-salary ! Is it 28 all in all or its just the basic and then there is more for the flying hours ?
That's basic. Per diem and pension will be on top of that. Per diem: around 4-6000 Dkr/month, pension (DK): 15% of the basic part. I'm not sure about the Swedish and Norwegian pension and per diem, but there are local differences.
2- how many hours per month does the pilots fly ? and does it depend on the type if its 320 or 737 ?
Hours pr. year: 650-900. It probably does vary from type to type, but I don't know the exact numbers.
3- do you have to be fluent in any of the Scandinavian language or its enough to know some basics
My best guess is, that you have to be fluent at the time of employment. SAS has a Berlitz level somewhere on the recruitment website.