This language differentiates front-rounded from back-rounded vowels, as in vu, "seen" & vous, "you"
DEJA VU In French "deja vu" means literally "already seen" and 
usually... [DOC] [TLE] THE VOWEL PHONEMES OF MEIGRET - Georgetown University [PAR] articulatory area of the front unrounded vowels, then, Meigret's ...... 46 Vous 
dones ' you give' does not come under this category, for Meigret allows -ez final 
as an .... namely, two kinds of u, one of which is close, as in tu ' thou', vu ' seen', 
courir sus ' attack ' .... Meigret's alphabet has two symbols for back-rounded 
vowels, o.