Unicode For Multiple Languages

I have an ASP page that I want to support multiple languages. If I set the
<%@ Language=VBScript CodePage=65001%>

and adds a
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

meta tag it seems to work OK. Now instead of setting the codepage in every
page I tried adding a global.asa (Session_onStart) file and add
session.codepage=65001 and also tried to add response.charset="utf-8" (I was
not allowed to set <%@ Language=VBScript CodePage=65001%> inside
global.asa). This does not seems to work though.
Is it possible to set a codepage in some event in a global.asa to make it
global for the entire application? Is it possible to add a directive in
global.asa that works like setting a <meta http-equiv="Content-Type"
content="text/html; charset=utf-8">. If this is possible I don't have to
recomplie my business logic that creates the html.