My question IS a theological one...
There are two question here: (1) Is the designation "Creator" properly applied to the Holy Spirit, and (2) What is the best translation of Ζωοποιον / животворящаго as found in the Creed?
Concerning (1), as mentioned above, the Latin liturgy witnesses to
Veni Creator Spiritus; also, from scripture, perhaps:
Psalm 104:30 You shall send forth your Spirit, and they shall be created; and you shall renew the face of the earth.
Dn. Anthony