Well...I may be wrong, but I think, at next content-update, both translations will be in too, right?
So....why bringing them up singulary?
IMHO, at evry update, players expect new content, new things to explore.
If there is not an urgent bugfix needed (which usually is fairly rare), I´d focus on a new content
and include any additional things like another language to that.
Most ppl are able to read english, so those, who cant, wouldt have waited for french or german anyway.
True, nice to have, but new content would be nicer