Another tale information that a demon named Madan acquired Vak-siddhi, by which what ever he mentioned came true. He misused it to trouble humans and murder individuals. Yet another etymology indicates that valga implies "to paralyze" and symbolizes the strength of stambhana, "paralysis" the goddess is said to grant; this principle seems questionable https://www.youtube.com/shorts/5VeSyP9JRw0