2010 Server Language Packs for SharePoint Server 2010, Project Server 2010, Search Server 2010, and Office Web Apps 2010: http://www.microsoft.com/downloads/details.aspx?FamilyID=046f16a9-4bce-4149-8679-223755560d54&displaylang=en

Select Change Language drop-down list to specify one of the language above (please note not all SharePoint 2010 language packs are supported with Project Server 2010, please read the TechNet documentation for a list of supported language packs), follow the installation instructions documented on TechNet and voila you are ready to do a Portfolio Analyses or should I say “Analyses de portefeuilles” using your favorite language.

Happy localization!

Microsoft Project Server 2010