In order to be able to perform a translation of FLEXIcontent in the best conditions please follow this procedure :
(sample for the german language / de-DE)

Preparatory work :

• Install Joomla on your local server
• Download and install the german language pack on your site (http://sourceforge.net/projects/jgerman/files/Joomla!%201.5/Joomla!%201.5.14v1/de-DE_joomla_lang_full.1.5.14v1.zip/download)
• Download and install the latest FLEXIcontent release
• Download and install the "Translation manager" component (http://joomlacode.org/gf/project/joomla_1_5_tr1/frs/)

Translation :

1. Choose the menu : components -> translation manager
2. Click on Administrator -> German, then on View Files
   
   
   
3. Click on com_flexicontent to create the language file and start the translation.
   
   
   The document is structured by views in order to make it easy for translators. The main categories are VIEWS CONTROLLERS and PARAMETERS.
   
   
4. Don't forget the plugins and the frontend language file (site).
   
   
   
5. You will find the created files here :
   1. Site :
      language/de-DE/de-DE.com_flexicontent.ini
   2. Administration :
      administrator/language/de-DE/de-DE.com_flexicontent.ini
      administrator/language/de-DE/de-DE.plg_flexicontent_fields.................ini
      ...and so on for the other plugins
6. Create two zip archives : admin and site and send it over to me (emmanuel AT joomla DOT fr), I'll either integrate it the core or build an installer for your package.

Good luck and thanks in forward for your help.