title: Regex + vee-validate
body: <p>I use vue.js and vee-validity. I need help with regex.</p>
  
  <p><strong>Firstname and lastname</strong></p>
  
  <ul>
  <li>First letter big, others small</li>
  <li>Allow only letters and UTF-8 characters such as "č,ř,ž,ý,á,í,é,ě,š"</li>
  <li>Do not allow numbers, spaces or special characters</li>
  </ul>
  
  <p><strong>Nickname</strong></p>
  
  <ul>
  <li>Allow only letters (big, small), numbers and UTF-8 characters (same)</li>
  <li>Max 13 characters</li>
  </ul>
  
  <p><strong>Template</strong></p>
  
  <pre><code>v-validate="{required: true, regex: /^[a-zA-Z]+$/ }"
  </code></pre>