title: Need regular expression for multilingual which allow only alphabets
body: <p>I need regular expression which allow only alphabets of any language but doesn't allow special characters and numbers.
  Right now i am using this express but it doesn't work in Arabic language</p>
  
  <pre><code> ^(?=.{1,})[a-zA-Z'.\s]{1,50}$
  </code></pre>