A Different tale information that a demon named Madan acquired Vak-siddhi, by which what ever he reported came true. He misused it to problems people and murder people today. Yet another etymology implies that valga usually means "to paralyze" and symbolizes the strength of stambhana, "paralysis" that the goddess is claimed to grant; https://www.youtube.com/shorts/5VeSyP9JRw0