1) Prajnaparamita's MantraHer mantra--oṃ āḥ dhīḥ hūṃ svāhā--is all seed syllables, not 'regular words' with meaning, so not translatable. Here is some more info about this mantra and the seed syllable dhih from Visible Mantra.
Here is the Devangari script:
2) The Heart Sutra mantraThe Heart Sutra mantra--gate gate pāragate pārasaṃgate bodhi svāha--comes at the end of the Heart Sutra. It is not usually translated into English.
gate gate pāragate pārasaṃgate bodhi svāha
(graphic from Conze--'Om' in the middle)
Translations of the Heart Sutra mantraEdward Conze:
Gone, gone, gone beyond, gone altogether beyond, O what an awakening, all hail!
Thich Naht Hanh:
Gone, gone, gone all the way over, everyone gone to the other shore, enlightenment, svaha!
14th Dalai Lama:
Go, go, go beyond, go thoroughly beyond, and establish yourself in enlightenment.
Gone, gone, utterly gone, awakening…wow!
3) Invocation to Prajnaparamita
This is the first line of the Heart Sutra in Sanskrit, which Conze translates as "Om Homage to the Perfection of Wisdom the Lovely, the Holy!"