Yes! Found a solution, please download immediately from the page (or fork that on github) the backup this great guy has done, michaeljcole, on github:
https://michaeljcole.github.io/wiki.unrealengine.com/
If there was a failure on the wiki from server on ue4 with this they will at least partially restore the wiki (or serve us only static pages).
Hope that will be useful to all you guys !