If you only want translations for the Na'vi language parts, search for "English Forced" subtitles.
Because this edition includes roughly 16 minutes of additional footage, standard theatrical subtitles will not sync correctly. subtitle Avatar.-.Extended.Collectors.Edition.2...
If your subtitle is off by a few seconds, you can fix it manually in real-time or permanently. Option 1: Quick Sync (VLC Media Player) If you only want translations for the Na'vi
VLC allows you to adjust timing using keyboard shortcuts while the movie is playing: subtitle Avatar.-.Extended.Collectors.Edition.2...