Hello,
because this is my first post after site restoration, I'll start with something short.
It is possible to create multilingual content (for example cyrllic) in MOSS, as you already know. But, if you create fields, lists or libraries that contains cyrillic names, maintaining such content will become very difficult because of fact that in MOSS cyrillic named fields will be represented as a sequence of characters like this: _x0417__x0430... Such content is referenced in CAML queries, web parts and all across MOSS site, and also in web addresses and query strings. One workaround for this is to create content using Latin English names and afterwards to rename fields, lists, libraries to appropriate names. Once created, those fields will always be internally referenced by its Latin name, but displayed to user with changed name. In this case, in CAML queries, web parts and all across MOSS site this content will be much easier to maintain and use.