Documentation for JIRA 4.1. Documentation for other versions of JIRA is available too.
Most user-visible pages in JIRA are now internationalised. Chinese, Czech, Danish, English, French, German, Italian, Norweigian, Polish, Portuguese (Brazilian), Russian, Japanese, Slovak and Spanish translations are available (at time of writing), with more in development.
When JIRA is first installed, the default language may be chosen by clicking on a flag:
Individual users can choose their own language, which will override the default language (see above).
Should you wish, you can easily specify your own translations for the values of the following JIRA issue fields:
Your specified translations will override the values specified in the JIRA translation.