Future extension of arabic tree.
I remarked that :
the arabic tree is very short : only 31 units.
some units are titled "something 1", but there is no "something 2" in the actual tree : weather 1 / hobbies 1 / food 1 / clothes 1.
So I think that the arabic tree will be extended, and that is already programed.
I have not finished this tree yet, (units until "office" discovered for me), but I wish it will be extended soon.
Many thanks to the contributors.