Detect alphabet used in submitted text (forum/blog)
<p>I would like to know the best way to detect the alphabet used when people submit posts on my forum (can be useful for blogs too).
The thing is lately I got a lot of spam in cyrillic alphabet, greek alphabet and japanese, so since my forum is for french and english speaking people, I would like to prevent spammers from posting in different alphabets.
Is it possible with a regular expression?</p>

<p>Thanks!</p>
