Hi satya_HK,
I suspect this is because Unity does not leverage the Foundation framework API for supporting localisations. The way iTunes inspects for your supported languages is through the properties of your application folder structure that are a product of the usage of the Foundation localisation API.
A somewhat reasonable workaround is adding empty localizations to your project, so that they will be picked up as metadata:
- Open your Xcode project, and select the Project file on the left (the top-level file in the file navigator)
- Select the project under "PROJECT" in the sidebar
- With the 'Info' tab selected, scroll down to 'Localizations', and add your supported localisations there
Screenshot here: http://i.imgur.com/mdXU6wx.png
Hope this helps,
- w