The countryside in Africa, Asia and South America is savannah, grasslands, desert, scrub, alpine, conifer forest, tropical forest, equatorial forest and other classifications. As you travel, concentrate on observing your surroundings and work to expand your vocabulary. African traditional or folk medicine is a treasure house of knowledge rivaling that of the Chinese. What he practices, then, is traditional healing or herbalism. If he specializes in emotional disorders, he is doing psychic healing.
All people have their own system of religion and philosophy.
So one person's belief and prohibition is another person's superstition. Interestingly, almost all religions teach the same underlying values. Additionally, because of the overall structure of the culture the religious leaders may be de facto leaders of the society, at once psychologists, physicians, diviners, musicians and spiritual healers. Some of the most important cautions about vocabulary are very place specific. Be alert to these when they come up.