When you consider the localization of MVC App, you should consider below mentioned scenarios.
1.Views validation
2.Simple culture switching mechanism
3.Model Validation messages localization
4.DisplayName attribute localization
5.OutputCache and Localization
For get more details of above scenarios check :
ASP.NET MVC Localization complete guide
http://adamyan.blogspot.com/2010/02/aspnet-mvc-2-localization-complete.html[
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Globalization, Internationalization and Localization in ASP.NET MVC
http://www.hanselman.com/blog/GlobalizationInternationalizationAndLocalizationInASPNETMVC3JavaScriptAndJQueryPart1.aspx[
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I hope this will help to you.