Hi,
I'm Spanish and my language uses different marks or sings (á, è, ï, ô, ñ, ç ...). I checked that all characters with symbols are omitted in the urls, but this is not the correct behavior: the diacritics should be omitted but not the letters.
Lórem ipsùm dölor çit añet
should be /d/lorem-ipsum-dolor-cit-anet
.