How do I set up default dictionary used instead based on browser setting.

 

I notice 

 

if (Request.Params["Culture"] != null)
         {
            culture = Request.Params["Culture"];
         }

 in SpellCheck.aspx

 

2 question 

1.) How do I change the setting for parameters  Request.Params["Culture"] ?

 

2.) How do I overwrite the original default setting ?