Kera foehunter:
that sounds cool rabid rats !!and the mad rat ogre
Firehammer:
Okay, the Warseer folks told me that all those “new” entries are from the Lustria campaign book, so not really new (I only remembered the Cauldron, not the other stuff). So:
Plague Priest on Cauldron of a Thousand Poxes = in the list
Plague offspring (“rejeton pestilence”) 40x40 ! = Rat Spawn
Pus bag 20x20 = Pusbags
rabid rat = Rotten Rodents
purulent novice (beginner plague monk) = Stinking Thing?
insane/imbecile rat ogre = Mad Rat Ogre
Hashut’s Scion:
Yes, the new ones are from Lustria, specifically the Bubonic Courth of Nurglitch. One of the more interesting points of that list was the loss of all packmasters, supposedly by death due to disease, but the giant rats and Rat Ogres gaining Frenzy. Thus, they were ITP until they lost in combat. Nurglitch gave the list that as long as he was alive, units that had Frenzy could never lose it.
Ancre:
Ha ha you don’t need french people to traduce ! 
I think it’s the units from the lustria list too, unfortunately I have neither the lustria book nor the skaven book in english, so I can’t be of much help.
( … and now I just realized I expected to play with french people with an english pdf ruleset … ugh I need to find a french one 
)
EDIT : sorry for threadomancy, I haven’t seen the dates and though it was fairly new.