Change The Language For Pages?

I'm able to change the language for my pages, however if I select french and I am on a current page and if I try to load another page, that page won't be in french. How can I set it so it is consistent throught?

Toggle Button in master page:
If Page.Culture = "English (United States)" Then
Response.Redirect(Request.Url.AbsolutePath + "?lang=fr-CA")
ElseIf Page.Culture = "French (Canada)" Then
Response.Redirect(Request.Url.AbsolutePath + "?lang=en-US")
End If

and in every page:

Protected Overrides Sub InitializeCulture()
Dim lang As String = String.Empty
lang = Request.QueryString("lang")
If lang IsNot Nothing Then
Session("culture") = lang

[Code]...