Thanks Alexander, I will follow your suggestion for the design.
Regarding to Windows Phone Application, this application invokes operations in a WCF service hosted in Azure and there the queries to the multilingual database are implemented.
Now, my doubt is: how does the WP client set the language of the required data?
I mean, each WCF operation should have a parameter defining the language of the required data? Or should be better to create more than one WCF service
depending on the language?