Windows 7: Question About Ultimate and Non-Western Languages

Recently I bought and installed Windows 7 Ultimate (32-bit). The main selling point to me was that it had support for 38 different languages, one of which was Japanese. I was under the impression that this meant I could have my locale set to English, but also run software in Japanese on the fly without the text being a garbled mess like I used to see running them in Vista Home while in the English locale (unless I use this AppLocale program), but I could change my locale to Japanese and it would work on restart. Apparently I was wrong. While using some programs like Paint Tool Sai (and its installer for that matter) it has that mess rather than Japanese kana and kanji. It does work if I change my local to Japanese, but I don't want to have to restart my computer every time I want to use these programs
So, that being said, is there some setting that needs to be enabled, or did I just waste money on a feature that I misunderstood? Thank you all in advanced for the help.

You misunderstood, the language packs are for total conversion to another language.

Well, that's a disappointment. Oh well, I'm sure I can make use of some of the other features it comes with (primarily the "previous versions" feature). Are there any suggestions to achieve what I wanted (I believe AppLocale was only intended for Windows XP, and people weren't sure about Vista at the time I used it)?

Edit:
I found a step-by-step on how to install AppLocale on Windows 7 here:http://www.elitepvpers.com/forum/for...-7-useful.html

So I will just mark this as solved.