You’d suppose that Sanskrit is an even more dead language, but apart from it being an official language in India, there are in every Indian census people who claim that Sanskrit is their home language.
Just recently, it was my unmitigated joy to view a Swiss documentary about the revered art of Tibetan medicine. It proved especially rewarding, moreover, to see patients in Dharmsala, India, spontaneously reciting votive mantras, while a Bhuddhist physician examined and treated their various ailments. As for the entire procedure involving doctor & afflicted, something about it struck me as rather curious, because all the method and theory applied therein, very much resembled what I once knew to be traditional practice in not too distant China. So now the picture becomes abundantly clear, how easy it must certainly have been, for Han civilization to import and, over the long march of dynastic time, duly appropriate from its Asiatic counterpart, both celestial astrology and diagnostic medicine.
Regrettably, my ear lacked the fine tuning, necessary to distinguish Tibetan from Sanskrit on audio track; so I could not tell if suppliant monks* were enunciating clerical or vernacular prayer, when invoking spiritual purity during this solemn ritual. All the same, Franz Reichle Das Wissen vom Heilen (1996, aka The Knowledge of Healing) really left me to wonder: What a "primitive" form of health care, that has time & again demonstrated remarkable, quasi-scientific leaps forward in alternative medicine and supportive therapy! Who therefore is so brazen as to question the dynamic role of cathartic mantras, Sanskrit or otherwise, so integral to this most venerable of professions, that predates modern industry by several thousand years, and achieves universal trust in Tibet and Mongolia, with a superb record of performance & success?
*English "monk" can be used in Tibetan Buddhism, to denote female, as well as male celibates of the lama’s cloth—this semantic parallel not unfaithful to original Greek monachos, gender-neutral for "hermit" of either sex.