Encyclopedia of Typography and Electronic Communication
Defines a lot of Unicode and linguistic terminology. An excellent resource.
http://ourworld.compuserve.com/homepages/profirst/encycl2.htm

Glossary for Supporting Multilanguage Text Layout and Complex Scripts with Windows NT 5.0 article
The original article was pusblished by F. Avery Bishop, David C. Brown, and David M. Meltzer in the November 98 edition of MSJ. This glossary defines a handfull of terms.
http://www.microsoft.com/msj/1198/multilang/multilangsidebar.htm