If you are facing issue with display of Non-English characters in your site/ page then you can check following things-

1. Change Request Parameter Encoding a. Go to OSGi configuration console (http://localhost:4502/system/console/configMgr) and search for "Apache Sling Request Parameter handling" Service
b. Change Encoding to "UTF-8"



c. If changing this does not work then try restarting AEM after this change.

2. Set Character Encoding to "UTF-8" in Ajax and Servlets.