Hi A.Salah ,
The language when viewing report manager is taken from IE culture.
see
http://msdn.microsoft.com/en-us/library/ms156493(SQL.90).aspxThe language & Culture for for a single text box is set via properties "F4"
look for Language properties pull down language\culture SSRS 2005 is in words whilst SSRS 2008 has it in in the four letter format.
To set the language for the complete report.
SSRS 2005 top top left of the design window for a small square click on it en press "F4"
SSRS2008 Click on the blackground then "F4". ( not the body but the area out side of the page layout.)
The properties you set at report level are inherited and marked as "default"
see
http://msdn.microsoft.com/en-us/library/ms159642.aspxIf you want to set the culture via =User!Language then set it in any of these places
If You want to set the Culture via a URl this can be done by using the 4 letter format
see
http://msdn.microsoft.com/en-us/library/ms155064.aspx Hope this helps