Ok, I have read through all 5 pages of this thread and still have a query. I have an unlocked BB 8320 from T-Mobile in the USA and I want to have an English OS that still allows me to read and write Chinese.

On Singapore Telecom Mobile Pte Ltd's page of downloads, I see this:
BlackBerry Handheld Software v4.2.2.338 (Chinese)
Package Version: 4.2.2.338

Because it says "Chinese", does that mean the entire OS is Chinese, or will it still be English and allow me to read/write Chinese when I need to?

I see another one from Hong Kong CSL Limited has this version:
BlackBerry Handheld Software v4.2.2.321 (Multilanguage)
Package Version: 4.2.2.321

I assume the "Multilanguage" will be English and then give me the ability to read/write Chinese, correct? The Singapore version is higher, so I guess I'd rather have and use that if it has English as the default and then allows me to write/read Chinese.