change my html code in my wordpress website

i have a html code in which i have some basic functions like fetching data from google sheet, playing audio from the sheet, and then offer typing for students. i want to introduce hindi typing options in this code so that a user can type in hindi in mangal inscript and krutidev layout without installing third party appliction on his pc. further, i want to refine the result parameters, like how the errors in the matter typed by the students are calculated and displayed. rest of the things are working very well in the code. html code is attached herewith. this is basically for shorthand learners.