The purpose of the Translation Team within the Production Working Groups is to be a liaison between the Joomla! Translation Teams, the International Community and the other Joomla! Teams on user and technical matters relating to the translation of the Joomla! application.
The Translation Working Group carries out its work according to the Joomla! Translation and Localization Policy.
The Translation Working Group is also called the Joomla! Translation Coordination Team. It is composed of members of the Joomla! Translation Teams. See a list of current members here.
For 2.5 see: 2.5 current languages here
For 3.x see: 3.x current languages here
The resources provided by these teams are available on a common repository on joomlacode: 1.5 language packs
For 2.5 see: 2.5 language packs
For 3.x see: 3.x language packs