My latest assignment involves internationalization and localization testing. Other QA'ers have been asking me where to go for information on testing I18N and L10N.
One of my favorite references is actually for developers... check out <a href='http://java.sun.com/docs/books/tutorial/i18n/index.html'>this page on the Sun website.</a>. It has loads of ideas about what needs to be changed and what is likely to break.