How to say welcome in arabic ?
Welcome is important word used in many sentences.
In short, welcome in arabic , spell as one of the following : marhaban, ahlan wa sahlan, and sharaftana.
as example: Ahmad! you are welcome in USA, in arabic said as : marhaban bek ya Ahmed fee Amreeka.

also you can say: Welcome my friend in my home, as : " ahlan wa sahlan bek ya sadeeki fee baitee.
Welcome=ahlan wa sahlan
my friend=ya sadeeki
in=fee
my home=baitee