In the art of Candi Sukuh, we also see an early indication of the kris (also keris) or ritual dagger as an important magical instrument for rituals in Javanese society (and in some other cultures of Indonesia as well).
Today, even in the Muslim era, many sacred rituals in Javanese society involve a kris.
These daggers are highly valued, and are seen as having a sacred power of their own, which was invested in them at the time of their making.
Many people speak of krises that performed amazing magical acts.
Traditionally, a man would wear a kris for a ritual or ceremonial occasion.
Of course the king and courtiers used refined or halus language. Even today, Javanese language maintains these different registers of speech.
Partly for this reason, when modern Indonesia became independent, the founding leaders chose Malay, a more egalitarian language, as the new national language (“Indonesian”), in linen with democratic ideals.