Text box during typing website not support Remington Key Layout auto

My Website is typing related website And During Hindi Mangal Test My Text box not support Remington Key Layout auto i install hindi indic than support so i want this is auto just like example
1. My Site www.rknnawada.online
2. https://www.typingbaba.com/test/online-hindi-typing-test-mangal-font.php
I want only function to auto just like typing baba website