title: Detecting non-ASCII characters in Rails
body: <p>I am wondering if there's a way to detect non-ASCII characters in Rails.</p>
  
  <p>I have read that Rails does not use Unicode by default, and characters like Chinese and Japanese have assigned ranges in Unicode. Is there an easy way to detect these characters in Rails? or just specify the range of characters I am expecting?</p>
  
  <p>Is there a plugin for this? Thanks in advance!</p>