How to implement url redirects in Freemarker?

Thanks again! Here is the final code, which redirects users away from the Root page to their proper category page, based on language:

<#-- Description: If user is not an Admin/Mod, redirect them away from root to the proper language page  -->
  <#if page.name?lower_case == "mobilecommunitypage" || page.name?lower_case == "communitypage" >
      <#-- Check if the user is an admin -->
      <#assign is_user_admin = false />
      <#if user.registered >
             <#list restadmin("/users/id/${user.id?c}/roles").roles.role as role>
                 <#if role.name?? && (role.name == "Administrator" || role.name == "Moderator" || role.name == "Moderator2"|| role.name == "Analytics" )>
                     <#assign is_user_admin = true />
                 </#if>
             </#list>
       </#if>
      <#-- If the user is not an admin, get the language setting from their profile and store it in a variable -->
      <#if !is_user_admin >
         <#assign currentLanguageRedirect = rest("/users/id/${user.id}/settings/name/profile.language").value>
           <#switch currentLanguageRedirect>
              <#case "de">
                        ${http.response.setRedirectUrl("/t5/Community/ct-p/DE")}
                <#break>
              <#case "es">
                        ${http.response.setRedirectUrl("/t5/Comunidad/ct-p/SP")}
                 <#break>
              <#case "fr">
                         ${http.response.setRedirectUrl("/t5/Communauté/ct-p/FR")}
                 <#break>
              <#case "ja">
                         ${http.response.setRedirectUrl("/t5/コミュニティ/ct-p/JP")}
                 <#break>
              <#case "ko">}
                         ${http.response.setRedirectUrl("/t5/커뮤니티/ct-p/KR")}
                 <#break>
              <#case "ch">
                        ${http.response.setRedirectUrl("/t5/社区/ct-p/CH")}
                <#break>
              <#default>
                        ${http.response.setRedirectUrl("/t5/Help-Forums/ct-p/product")}
           </#switch>
           <#-- Run Set user language script, unless we set doNotSetUserLanguage to true here  -->
           <#assign doNotSetUserLanguage = true />
      </#if>
  </#if>