You might attach a note with a translation of the Hindi bits. I suppose it depends partly on how much Hindi there is. Copies are definitely okay. I wouldn't send the originals because you may or may not get them back.
Definitely worth doing. Obviously, you're not going to send the actual gifts.
You can black out the embarrassing bits, but you'll haveto explain why you did that. I've heard of other people doing that. Maybe you should just leave them in though. I've heard that people get asked (especially in interviews in India) intimate/sexual questions in interviews, so it might be less embarrassing to just send them in the letters and emails that to asnwer those questions in person. Anyway, blacking out embarrassing bits might be appropriate.
ok, i think i will attach a translation of the hindi bits with a signed letter by me swearing that the translation is correct.
okay..i think we will just leave them as they are.. but i hope they don't harass my husband regarding that when he does go in for the interview?