Not trying to answer for discom here, but we're complete beginners as for ROM translations, and we're trying to take over @cpasmoi as he won't be able to maintain it anymore. We're gonna take a look at OxygenXML, thanks for your precious help!
Hi ingbrzy, we are currently struggling to bring the french translation up to date, could you take a look at this thread?
http://xiaomi.eu/community/threads/need-help-for-miui-fr-translation.26218/