> My personal theory is that this is because you can make every sound you hear in English using the Devnagari script, but not the other way around.
This is not very close to true. English (even a given accent) has a rather high number of phonemes, and they don’t overlap very closely with Hindi. What is probably more relevant here is that Devanagari is relatively phonetic so writing in it is useful to describe English pronunciations, more so than the English script is for Hindi (or English, for most unfamiliar words).
This is not very close to true. English (even a given accent) has a rather high number of phonemes, and they don’t overlap very closely with Hindi. What is probably more relevant here is that Devanagari is relatively phonetic so writing in it is useful to describe English pronunciations, more so than the English script is for Hindi (or English, for most unfamiliar words).
A very incomplete list of languages by approximate number of phonemes: https://en.wikipedia.org/wiki/List_of_languages_by_number_of...