User blog comment:Kirkburn/Introducing the Community Page - a hub for community info/@comment-28037089-20160703104018/@comment-5501257-20160703153838

Hey Tugia, you can contact Wikia staff and make them enable it for you.

http://vi.phineasandferb.wikia.com/wiki/%C4%90%E1%BA%B7c_bi%E1%BB%87t:Li%C3%AAn_h%E1%BB%87/general

Note: It's Sunday so maybe they don't reply soon.