I'd be in favor of optimizing the situation with audio files, too.
Currently(v6) .wav files(wavc) weigh about ~1,1Mb+1,1Mb(~2,2Mb); English ones, that is. I see two problems:
- first, there's a /WAVC subfolder in /Tutu folder, and a /WAVC subfolder in /BGT folder; save for the filenames, they're identical.
It means ~1,1Mb extra;
- all files are in .wav(wavc), not .ogg, i.e. they are not compact enough(.ogg takes less space - I don't know about other people, for me .wav files took extra 12 minutes of downloading).
As for audio translations, I'd suggest making separate packages(if PPG admin allows): English package(which follows White Agnus's recommendations), and a (heavier) separate package with all audio translations.
Good luck with v7.