For multiple subs & languages I recommend you Full Blu-rays (ISOs/BDMVs), these ones have several languages and you can download them according to what you need
On HD-Torrents also they upload remuxes with several subs but they only have the original audio with many subs, while BDMVs has multiple audios and subs.
Full BDs are almost everywhere, but good trackers I recommend HD-Torrents, Blutopia, FileList and many Chinese trackers
Here is the trackers list:
http://torrentinvites.org/trackerlist.php