Here you can find the latest versions of XOOPS. New users should download the latest full version, users who already have a XOOPS site should get the latest upgrade packages.
XOOPS 2.5.10 is the most stable and most advanced XOOPS release to date. This version has the benefit of years of bug fixes, security patches and performance enhancements. This version is compatible with almost every module and theme created for the XOOPS system. It is recommended to upgrade all XOOPS systems to version 2.5.10.
Instructions on how to submit translations can be found in this post.
XOOPS Operations Guide: read it here
XOOPS Installation and Upgrade Guide: read it here