From the JIRA 3.2 Beta Release Notes:
"Continuing our commitment to a fully internationalisable issue manager, JIRA 3.2 provides the ability to translate all issue settings - i.e. Priorities, Statuses, Issue Types and Resolutions. This allows for even more complete translations to present JIRA to each user in their own chosen language."
I still miss being able to translate the following settings before JIRA is fully internationalisable.
1. Project Categories
2. Issue linking
3. Sub-Task Types
4. Workflows (i know i can make a new workflow in a second language, but when two persons with two different languages uses the same project, the workflow will only be presented in one of the languages) and their transitions.
5. Custom Fields (same problem as with workflows)
6. Security Levels
7. Field Sceen Tabs
8. Field descriptions
In other words: anything user configurable that is shown to the users.
As long as this is missing, it still gives no sense to use JIRA in a multilanguage environment. My setup is in danish. A person speaking only english will not be able to use it, since the workflow, the security levels and so on gives no meaning to him.
Disclaimer: i haven't installed 3.2 yet, so if any of the above settings actually IS translatable, please excuse me for not being up-to-date.