There are several standards https://en.wikipedia.org/wiki/Devanagari_transliteration#Transliteration_comparison https://en.wikipedia.org/wiki/Devanagari_transli

There are several standards https://en.wikipedia.org/wiki/Devanagari_transliteration#Transliteration_comparison https://en.wikipedia.org/wiki/Devanagari_transliteration#Tra... Nobody bothers to use them. Same for Urdu https://en.wikipedia.org/wiki/Roman_Urdu https://en.wikipedia.org/wiki/Roman_Urdu