Mantras are only endowed with transformative energy if presented in initiation (dīkṣa) through the mouth of a guru. It's not so much accurate pronunciation, but alternatively the facility with which the mantra is endowed that gives it transforming functionality. Both of those Vedic and Avestan mantras have many practical similarities. https://shani69122.ampedpages.com/how-yantra-can-save-you-time-stress-and-money-63724690