Mountain pose: Tadasana. But then there's also Parvatasana, the Mountain pose.

Hi all,

I've been wondering why these two quite different asanas, Tadasana and Parvatasana, both translate to 'mountain pose'?

Can anyone shed some light on possible reasons or (mis-)translations?

(just in case this comes up: yes, I am aware of the differences between Parvatasana and Adho Mukha Svanasana.)