Added some review.
Also you need to translate complete file in hindi.
Title links should go to the parent repository https://github.com/reactjs/reactjs.org

can you tell me what i need to convert in hindi , and which title link should go to parent repo. I didn't get what needs to be modified

All the text in the file should be translated to hindi. You can check this PR for reference
https://github.com/reactjs/hi.reactjs.org/pull/41/files

English Words i have used are React, Map, Set, requestAnimationFrame, core-js, babel-pollyfill, pollyfill
The PR you mentioned is also using React, UI, React DOM , setInterval, ReactDOM.render(), Text, callback etc.
if you want i can change core-js, babel-pollyfill, pollyfill but rest are React and Javascript Specific.Please tell me what i need to change because i am not able to figure out of these word which i should change.