By default, the date, currency, and number formats are determined by the language of the report server at run time.
To override the formatting provided in the language of the report server, you can set the Language property in the report when it is developed. This can be set at the report level or at the TextRun level. If you want to change the formatting based on the language or local settings of the browser or client application, you can set the Language property to an expression that contains the User! Language
This information has been provided HERE .
In the Report, you can set the language property, which is located in the "Localization" section. In this property, you put the language code, for example en-GB. You can also do this at the field level if you wish. This should match your regional and language settings on your PC. If you want to override this or manage it, you can simply set the report property.
If you set this property and then look at the report code (RDL), you will see it at the very bottom:
<Language>en-GB</Language>
This information will be used for currency, date and numerical conversions.
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