What's a good regex to include accented characters in a simple way?

Question

Right now my regex is something like this:

[a-zA-Z0-9] but it does not include accented characters like I would want to. I would also like - \' , to be included.

Answer 1

Use a POSIX character class (http://www.regular-expressions.info/posixbrackets.html):

[-'[:alpha:]0-9] or [-'[:alnum:]]

The [:alpha:] character class matches whatever is considered "alphabetic characters" in your locale.