Hindi and English have several similar yet distinct phonemes.
/v/and/w/- The English/w/is bilabial (both lips touching), similar to Hindiव. The English/v/, however, is labio-dental (upper teeth touching lower lips), a sound distinct for the English speaker but indistinguishable from/w/for Hindi speakers./ph/and/f/- English uses labiodental/f/. Hindi, however, uses bilabial/ph/फ](/linguistics/indian-accent/). Fun fact: Ancient Greeks distinguished between these two sounds. But not to English speakers. So, Telephone and Telefone now have the same pronunciation, that is,/f/in English./ɹ/and/r/र- The English r (/ɹ/) is retroflex (tongue curling backward likeट). In fact, that’s the only retroflex sound in English; Hindi/r/, however, is generated at the alveolar ridge (the ridge right behind your upper teeth). Fun fact: The Sanskritऋis pronounced/ɹ/- English
/t/vs Hindi/t/त- The English T sound is unique in many ways. It does not exist even in other major European languages like Spanish and French. Both Hindi’sतand EnglishTare made at the alveolar ridge. The Hindi/Spanish/French/German/t/is made with the tip of the tongue, while the English/t/is made with the blade of the tongue, giving it a thicker sound. /θ/(th) vstʰ/थ- The Hindiथis dental in nature; the sound is made by touching the tip of the tongue with the back of the upper teeth. While the English/θ/thsound is interdental, for example, in thinking or thin. This sound is made by putting the tongue tip between the upper and lower teeth while simultaneously touching both./ð/vs/d/द- Similar toथ, the Hindiदis dental in nature. The English/ð/is interdental. For example, in “this” or “father”, the th sound is produced by the tongue hanging between the middle teeth. The English/d/is non-retroflex and is pronounced in the same spot as the Hindiद. So, the transliteration of London asलंदनisn’t too far from being correct!/ʒ/vs/dʒʱ/झ- Consider the second sound in “vision” or the third sound in “decision”. It gets incorrectly approximated as/z/ज़or/s/स./ʒ/, however, is made by touching the tongue to the ceiling of the mouth and creating friction. Hindi speakers would find it easier to imagine this as a fricative version ofझ.