Update the tip for the course language field

cms/templates/js/mock/mock-settings-page.underscore

@@ -103,7 +103,7 @@
         <option value="" selected> - </option>
         <option value="en">English</option>
       </select>
-      <span class="tip tip-stacked">Identify the course language here. This is used to assist users find courses that are taught in a specific language.</span>
+      <span class="tip tip-stacked">Identify the course language here. This is used to assist users find courses that are taught in a specific language. It is also used to localize the 'From:' field in bulk emails.</span>
     </li>
 
   </ol>

cms/templates/settings.html

@@ -284,7 +284,7 @@ CMS.URL.UPLOAD_ASSET = '${upload_asset_url | n, js_escaped_string}'
                   <option value="${lang}">${label}</option>
                 % endfor
               </select>
-              <span class="tip tip-stacked">${_("Identify the course language here. This is used to assist users find courses that are taught in a specific language.")}</span>
+              <span class="tip tip-stacked">${_("Identify the course language here. This is used to assist users find courses that are taught in a specific language. It is also used to localize the 'From:' field in bulk emails.")}</span>
             </li>
           </ol>
         </div>