It seems that it goes in English alphabetic order (or as close as possible), so, if the alphabet you're trying to post in has a /j/ sound, you would post a word starting with that letter. Otherwise you start with the /a/ sound, etc.
Basically you try to match the non-Latin script as closely as possible to the English one.
EDIT: I thought I had made a post about this before, and I just found it! Check out my post towards the middle of the second page of this thread.
EDIT2: Forgot about <y>.