Add Success Criteria section to the IG charter (#1895)

i18n-ig/charter.html

@@ -51,6 +51,7 @@
         <ul id="navbar">
           <li><a href="#scope">Scope</a></li>
           <li><a href="#deliverables">Deliverables</a></li>
+          <li><a href="#success-criteria">Success Criteria</a></li>
           <li><a href="#coordination">Coordination</a></li>
           <li><a href="#participation">Participation</a></li>
           <li><a href="#communication">Communication</a></li>
@@ -158,7 +159,18 @@ <h2>
 <p>The IG produces no Rec-track documents. It only produces documents that are published as web pages or by the Internationalization Working Group as Working Group Notes.</p>
 </section>
 
+<section id="success-criteria">
+  <h2>Success Criteria</h2>
+
+  <ul>
+    <li>Participation from a large group of people with knowledge in different languages and cultures as well as different aspects of Web architecture, to explore gaps in support for different languages and scripts on the Web, and to document requirements.</li>
+    <li>Providing advice and opinions to the W3C Internationalization Working Group and external organizations like <a href="https://home.unicode.org/">Unicode Technical Committee (UTC)</a>.</li>
+    <li>Sharing of information and ideas for promoting internationalization.</li>
+    </ul>
 
+  <p>This Interest Group expects to follow the TAG <a href="https://www.w3.org/TR/design-principles/">Web Platform Design Principles</a>.</p>
+
+</section>
 
       <section id="coordination">
         <h2>Coordination</h2>