SPNadmin ji, I have long adored languages. I took French, German, Italian...and while I believe you are right in Italian not having a W (or an X for that matter), French does have that letter in their alphabet. It is not commonly used but it is known.Many languages do not have a "w" ... Italian and French do not. But there is a "w" sound made by placing a "u" or even an "ou" at the beginning of a word, particularly in front of another vowel. We all know the French word "oui" pronounced as "wee" That seems to be how it works.
It is probably MOST used in English words that have been adopted. Web (WWW), talk-show, etc.
"Le watt" is as commonly used for that unit of electrical measurement as in English. ;-)
My French dictionary I have in my hands lists 20-30 W words, lots of which are from English. Some I am less sure about:
Wacapou. A type of guinean wood used in ebinistery.
wapiti: a large N. american deer with a whitish coat.
wedelin: small river boat made of 3 planks of wood.
I think of these, wapiti is the most French that I have heard.