Localization is not supported.
The Report Server's Admin module and Standalone Designer come in English. Reports produced by the Standalone Report Designer are Telerik.Reporting.Report objects serialized in XML, where RESX files cannot be used for localization.
The approach you can use is to have the report's data localized, and the report can pull the right data by using a report parameter specifying the language. this can be done by having the data stored with indicator for language and by using a parameterized SQL query - How to: Connect to a SQL Database
Please feel free to log a feature request in our feedback portal
. We will appreciate it if you elaborate which elements of the Report Server you need to localize (admin Module, Report Designer, Reports) as well.
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