@pavsmith @hongminhee
They look "off" in print. You can tell that something is wrong or badly typeset, even if you can't discover the exact character.

Kind of like a second language speaker with perfect pronunciation, but their choice of words and expressions doesn't match that of a native. You can tell it's not native speech even though you might not be able to pinpoint why.

A couple of the ones above are really obvious though, and would jump out immediately.