Dowry?

lol  1000 euro it's enough 

She can ask her own family(parents) what would be acceptable. It is something you need to show to (adoul) the guy who officialize the marriage, in other words it's a formality. I had friends who gave the money in front of the official and his wife gave it back to him afterwords. after all what's yours is hers and what's hers is yours.

That would be the same as asking what an acceptable wedding present would be in a western country.  If you both come from lower class familys an acceptable present may be 2 dozen roses or a simple necklace.  However, if you both come from well off familys an Audi or yacht plus a hundred thousand dollars would be more appropriate.  It's relative.
In Morocco even lower class Dowries can range from 20,000 to 50,000dh with 10,000 being an insult in most cases unless it is otherwise agreed between both parties that a dowry won't be given and it was just a small gift.  In any case, it's a sensitive issue that could cause your wife great embarrassment if it's less than expected.
I would suggest asking the father or other family members outright.  If they don't want to tell you, I would suggest asking your fiancee what her mother received and add 20 to 40 percent to that or what her siblings received and add 10  to 20 percent depending on how long ago they were married.
I'm certainly no expert and I've never been married but this is my understanding and opinion of the Dowry from what I have learned in my 2 years in Morocco.
Congratulations on your upcoming marriage and good luck!!