Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
If you delete the languages, does that mean the next time you're on a website with Japanese text it will all come up as question marks?
 
Some of your space may be going to virtual memory as well. Your VM size can be quite large. Does anyone know for sure if OS X reports VM space as "used" or "free"?
 
First thing I do when I get a new machine is a clean install. That gets rid of all the junk and lets me decide what I put on. After installing all my apps and getting set up, then I run Monolingual for languages, and Intel code on a PPC system. After that, I get rid of Help files, PDF's I don't need, demos, tutorials, Apache, etc. I also use iphoto diet, which hasn't been updated for 6.

I'm pretty militant about keeping things trim and it saves me quite a bit in space.
 
one idea that i'm about to just try because i don't use the app at all and i'd be able to reinstall it if need be: there are a good bit of .mov's in iDVD that are labeled with "PAL" referring to the european television standard, while it seems that there are also "NTSC" - american versions - of those same files. wikipedia tells me that with DVD's the only thing that really means is frame rate and line count (not color). so i figured you could ctrl click and "Show Package Contents," do a search for PAL or NTSC depending upon your location, and hit delete. iDVD is 1.5 gigs for me, so this could give me a bit back.
.......
and it did. i got half a gig out of this. i'm assuming problems could occur once i select PAL in the preferences so i won't do that (since those were the ones i canned). this is better than the disk image solution which only got me like 50 MBs.

i like this thread.
 
while i'm at it, on my particular system somehow i had two duplicate folders of GarageBand loops. actually it wasn't duplicate, one had more. i think this came about from a previous install when i did the whole Migration Assistant thing or something odd like that. so i deleted one. i actually use GarageBand on occasion so i'd rather not can the whole thing. that got me about a gig, and for those of you who migrated from a mac with previous versions of iLife might want to check that and see if that's the case for you.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.