You cannot simply replace them. is ß a B or is a ss? The point of unicode is that it is a larger set of characters without direct equivalencies. Create the mapping yourself and enforce it if you have to.
– Stefan HApr 25 '14 at 00:27
Possible duplicate of http://stackoverflow.com/questions/14814547/converting-unicode-characters-into-the-equivalent-ascii-ones
– Jack M.Apr 25 '14 at 01:20
For that matter: What is the "ASCII equivalent" of ✀? Or 中?
– Apr 25 '14 at 01:27