Another Tale records that a demon named Madan obtained Vak-siddhi, by which whichever he stated arrived true. He misused it to trouble people and murder folks. A different etymology implies that valga signifies "to paralyze" and symbolizes the strength of stambhana, "paralysis" that the goddess is alleged to grant; this idea looks questionable https://www.youtube.com/shorts/5VeSyP9JRw0