Anime News Network is reporting that Udon Entertainment shared an update on its Rose of Versailles manga release with independent review site Comics Worth Reading, and confirmed the statement with ANN.
The statement from Udon Entertainment reads:
While we do not have a solid date on release yet, the localization is coming along well. We have 80% of the whole series translated and going through editing now. The first book (our version, which includes both Vol. 1 & 2 of the complete edition) is in final stage of lettering. We are also working on the cover designs.
Udon Entertainment announced in July 2015 that it had licensed the series and planned to release the first two-in-one omnibus volume in the second quarter of 2016, but has not yet released the manga.