Some French subtitles on OpenSubtitles not there on Kodi

I configurated thé subtitles to be in french and download in french, but a lot of Times i dont find some French subtitles that exist on thé official site though, for example i was looking subtitles from the last epsiode of walking dead yesterday and i couldnt find anything, only when i chose English I found English ones, so is there à lack of support of french subtitles by kodi? I Guess thé subtitles are not automaticly synvhronised with thé site then, is there an easy way to download them directly from thé site with kodi ?